INSURED MUNICIPALS INCOME TRUST 204TH INSURED MULTI SERIES
487, 1996-08-21
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                                                    File No. 333-08677
                                                           CIK #896342

                   Securities and Exchange Commission
                      Washington, D.C.  20549-1004

                             Amendment No. 1
                                   To
                                Form S-6

For Registration under the Securities Act of 1933 of Securities of Unit
Investment Trusts Registered on Form N-8B-2.

A. Exact Name of Trust:         Insured Municipals Income Trust
                                204th Insured Multi-Series
                                    
B. Name of Depositor:           Van Kampen American Capital
                                Distributors, Inc.
                                    
C. Complete address of Depositor's principal executive offices:
                                   
                                One Parkview Plaza
                                Oakbrook Terrace, Illinois  60181

D. Name and complete address of agents for service:

   Chapman and Cutler           Van Kampen American Capital
   Attention:  Mark J. Kneedy   Distributors, Inc.
   111 W. Monroe Street         Attention:  Don G. Powell, Chairman
   Chicago, Illinois  60603     One Parkview Plaza
                                Oakbrook Terrace, Illinois  60181


E. Title and amount of securities being registered:  18,191* Units

F. Proposed maximum offering price to the public of the securities
   being registered: ($1020 per Unit**):  $18,554,820

G. Amount of filing fee, computed at one twenty-ninth of 1 percent
   of proposed maximum aggregate offering price to the public:
   $6,398.21  ($351.72 previously paid)

H. Approximate date of proposed sale to the public:
   As Soon As Practicable After The Effective Date Of The Registration
   Statement

____
/ X   :/Check box if it is proposed that this filing will become
        effective on August 21, 1996 at 2:00 P.M. pursuant to Rule 487.


*12,127 Units registered for primary distribution.
  6,064 Units registered for resale by Depositor of Units
        previously sold in primary distribution.

**      Estimated solely for the purpose of calculating the
        registration fee.
                    Insured Municipals Income Trust,

                       204th Insured Multi-Series
                                    
                          Cross Reference Sheet

                 Pursuant to Rule 404(c) of Regulation C
                    under the Securities Act of 1933
                                    
               (Form N-8B-2 Items Required by Instruction
                     1 as to Prospectus on Form S-6)

         Form N-8B-2                               Form S-6
         Item Number                         Heading in Prospectus


                I.  Organization and General Information

1. (a)  Name of trust               )
   (b)  Title of securities issued  )  Prospectus Part I Front Cover
                                    )    Page

2. Name and address of Depositor    )  Part II-Introduction
                                    )  Part I-Summary of Essential
                                    )    Financial Information
                                    )  Part II-Trust Administration

3. Name and address of Trustee      )  Part II-Introduction
                                    )  Part I-Summary of Essential
                                    )    Financial Information
                                    )  Part II-Trust Administration

4. Name and address of principal    )  Part I-Other Matters-Underwriting
    underwriter                     )

5. Organization of trust            )  Part II-Introduction

6. Execution and termination of     )  Part II-Introduction
     Trust Indenture and Agreement  )  Part II-Trust Administration

7. Changes of Name                  )  *

8. Fiscal year                      )  *

9. Material Litigation              )  *


    II.  General Description of the Trust and Securities of the Trust

10. General information regarding   ) Part II-Introduction
      trust's securities and rights ) Part II-Unitholder Explanations
      of security holders           ) Part II-Trust Administration

11. Type of securities comprising   ) Part II-Introduction
      units                         ) Part I-Trust Information
                                    ) Part I-Portfolios

12. Certain information regarding   ) *
      periodic payment certificates )

13. (a) Load, fees, charges and     ) Part II-Introduction
         expenses                   ) Part I-Summary of Essential
                                    )   Financial Information
                                    ) Part II-Unitholder Explanations
                                    ) Part I-Trust Information
                                    ) Part II-Trust Administration

    (b) Certain information regard- ) *
         ing periodic payment plan  )
         certificates               )

    (c) Certain percentages         ) Part I-Summary of Essential
                                    )   Financial Information
                                    ) Part II-Unitholder Explanations

    (d) Certain other fees,         ) Part II-Unitholder Explanations
         expenses or charges        ) Part II-Trust Administration
          payable by holders        )

    (e) Certain profits to be       ) Part II-Unitholder Explanations
         received by depositor,     ) Part I-Other Matters-Underwriting
         principal underwriter,     )   Part I-Notes to Portfolios
         trustee or affiliated      )
         persons                    )

    (f) Ratio of annual charges     ) *
         to income                  )

14. Issuance of trust's securities  ) Part II-Unitholder Explanations

15. Receipt and handling of payments) *
      from purchasers               )

16. Acquisition and disposition of  ) Part II-Introduction
      underlying securities         ) Part II-Unitholder Explanations
                                    ) Part II-Trust Administration

17. Withdrawal or redemption        ) Part II-Unitholder Explanations
                                    ) Part II-Trust Administration
 
18. (a) Receipt and disposition     ) Part II-Introduction
         of income                  ) Part II-Unitholder Explanations

    (b) Reinvestment of distribu-   ) *
         tions                      )

    (c)  Reserves or special funds  ) Part II-Unitholder Explanations
                                    )  Part II-Trust Administration

    (d)  Schedule of distributions  ) *

19. Records, accounts and reports   ) Part II-Unitholder Explanations
                                    ) Part II-Trust Administration
 
20. Certain miscellaneous           ) Part II-Trust Administration
      provisions of Trust Agreement )

21. Loans to security holders       ) *

22. Limitations on liability        )  Part I-Portfolios
                                    )  Part II-Trust Administration

23. Bonding arrangements            ) *

24. Other material provisions of    ) *
      trust indenture or agreement  )


    III.  Organization, Personnel and Affiliated Persons of Depositor

25. Organization of Depositor       ) Part II-Trust Administration

26. Fees received by Depositor      ) Part II-Trust Administration

27. Business of Depositor           ) Part II-Trust Administration

28. Certain information as to       )
      officials and affiliated      ) *
      persons of Depositor          )

29. Companies owning securities of  ) *
      Depositor                     )

30. Controlling persons of Depositor) *

31. Compensation of Directors       ) *

32. Compensation of Directors       ) *

33. Compensation of Employees       ) *

34. Compensation to other persons   ) Part II-Unitholder Explanations


             IV.  Distribution and Redemption of Securities

35. Distribution of trust's         ) Part II-Introduction
      securities by states          ) Part II-Settlement of Bonds in the
                                    )   Trusts

36. Suspension of sales of trust's  ) *
      securities                    )

37. Revocation of authority to      ) *
      distribute                    )

38. (a) Method of distribution      )

    (b) Underwriting agreements     ) Part II-Unitholder Explanations

    (c) Selling agreements          )

39. (a) Organization of principal   )
          underwriter               )
                                    ) Part II-Trust Administration
    (b) N.A.S.D. membership by      )
          principal underwriter     )

40. Certain fees received by        ) *
      principal underwriter         )

41. (a) Business of principal       ) Part II-Trust Administration
         underwriter                )

    (b) Branch offices of principal ) *
         underwriter                )

    (c) Salesmen of principal       ) *
         underwriter                )

42. Ownership of securities of the  ) *
      trust                         )

43. Certain brokerage commissions   )
      received by principal         ) *
      underwriter                   )

44. (a) Method of valuation         ) Part II-Introduction
                                    ) Part I-Summary of Essential
                                    )    Financial Information
                                    ) Part II-Unitholder Explanations
                                    ) Part II-Trust Administration

    (b) Schedule as to offering     ) *
         price                      )

    (c) Variation in offering price ) Part II-Unitholder Explanations
         to certain persons         )
   
45. Suspension of redemption rights ) *

46. (a) Redemption valuation        ) Part II-Unitholder Explanations
                                    ) Part II-Trust Administration

    (b) Schedule as to redemption   ) *
         price                      )

47. Purchase and sale of interests  ) Part II-Unitholder Explanations
      in underlying securities      ) Part II-Trust Administration


           V.  Information Concerning the Trustee or Custodian

48. Organization and regulation of  ) Part II-Trust Administration
      trustee                       )

49. Fees and expenses of trustee    ) Part I-Summary of Essential
                                    )    Financial Information
                                    ) Part II-Trust Administration

50. Trustee's lien                  ) Part II-Trust Administration


     VI.  Information Concerning Insurance of Holders of Securities

51. Insurance of holders of trust's )
      securities                    )  *


                       VII.  Policy of Registrant

52. (a) Provisions of trust agree-  )
          ment with respect to      )
          replacement or elimi-     ) Part II-Trust Administration
          nation of portfolio       )
          securities                )

    (b)  Transactions involving     )
           elimination of underlying) *
           securities               )

    (c)  Policy regarding substitu- ) Part II-Trust Administration
           tion or elimination of   )
           underlying securities    )

    (d)  Fundamental policy not     ) *
           otherwise covered        )

53. Tax Status of trust             ) Part I-Trust Information
                                    ) Part II-Federal Tax Status


              VIII.  Financial and Statistical Information

54. Trust's securities during       ) *
      last ten years                )

55.                                 )
                                    )

56. Certain information regarding   ) *
                                    )

57. Periodic payment certificates   )

58.                                 )

59. Financial statements (Instruc-  ) Part I-Other Matters
      tions 1(c) to Form S-6)       )

__________________________________
* Inapplicable, omitted, answer negative or not required

   
August 21, 1996
    

Van Kampen American Capital

Prospectus Part I

   
Insured Municipals Income Trust, 204th Insured Multi-Series

IM-IT 377                Pennsylvania IM-IT 222
    


This Part I of the Prospectus may not be distributed unless accompanied by
Part II. Both parts of this Prospectus should be retained for future reference.

In the opinion of counsel, interest to the Fund and to Unitholders, with
certain exceptions, is excludable under existing law from gross income for
Federal income taxes. In addition, the interest income of each State Trust is,
in the opinion of counsel, exempt to the extent indicated from state and local
taxes, when held by residents of the state where the issuers of Bonds in such
Trust are located. Capital gains, if any, are subject to Federal tax.
   
The Fund. The objectives of the Fund are Federal and, in the case of a State
Trust, state tax-exempt income and conservation of capital through an
investment in a diversified portfolio of tax-exempt bonds. The Fund consists
of two underlying separate unit investment trusts designated as Insured
Municipals Income Trust, Series 377 (the "IM-IT" ) and Pennsylvania
Insured Municipals Income Trust, Series 222 (the "Pennsylvania IM-IT
Trust" ). The various trusts are collectively referred to herein as the
"Trusts" or the "Insured Trusts" . The Pennsylvania IM-IT Trust
is sometimes collectively referred to herein as the "State Trust" .
Each Trust initially consists of delivery statements relating to contracts to
purchase securities and, thereafter, will consist of such securities as may
continue to be held (the "Bonds" or "Securities" ). Such
Securities are interest-bearing obligations issued by or on behalf of
municipalities and other governmental authorities, the interest on which is,
in the opinion of recognized bond counsel to the issuing governmental
authority, exempt from all Federal income taxes under existing law. In
addition, the interest income of each State Trust is, in the opinion of
counsel, exempt to the extent indicated from state and local taxes, when held
by residents of the state where the issuers of Bonds in such Trust are located.
    
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.





<TABLE>
INSURED MUNICIPALS INCOME TRUST
   
204th Insured Multi-Series
As of 8:00 A.M. Central Time on the Date of Deposit: August 21, 1996
    
  Sponsor: Van Kampen American Capital Distributors, Inc.
Evaluator: American Portfolio Evaluation Services
           (A division of an affiliate of the Sponsor)
  Trustee: The Bank of New York
   
<CAPTION>
                                                                                                      Pennsylvania 
GENERAL INFORMATION                                                                     IM-IT         IM-IT Trust  
                                                                                        ------------- -------------
<S>                                                                                     <C>           <C>          
Principal Amount (Par Value) of Securities in Trust <F1>............................... $   9,120,000 $   2,960,000
Number of Units........................................................................         9,109         3,018
Fractional Undivided Interest in the Trust per Unit ...................................       1/9,109       1/3,018
Principal Amount (Par Value) of Securities per Unit.................................... $    1,001.21 $      980.78
Public Offering Price:
 Aggregate Offering Price of Securities in Portfolio................................... $   8,662,702 $   2,870,128
 Aggregate Offering Price of Securities per Unit....................................... $      951.00 $      951.00
 Sales Charge <F2>..................................................................... $       49.00 $       49.00
 Public Offering Price per Unit <F3>................................................... $    1,000.00 $    1,000.00
Redemption Price per Unit <F3>......................................................... $      943.63 $      943.77
Secondary Market Repurchase Price per Unit <F3>........................................ $      951.00 $      951.00
Excess of Public Offering Price per Unit Over Redemption Price per Unit................ $       56.37 $       56.23
Excess of Sponsor's Initial Repurchase Price per Unit Over Redemption Price per Unit... $        7.37 $        7.23
Minimum Value of the Trust under which Trust Agreement may be terminated............... $   1,824,000 $     592,000
    
</TABLE>

<TABLE>
<CAPTION>
<S>                                  <C>                                          
   
First Settlement Date................August 26, 1996                              
    
Evaluator's Annual Supervisory Fee...Maximum of $0.25 per Unit                    
Evaluator's Annual Evaluation Fee....$0.30 per $1,000 principal amount of Bonds   
Evaluation Time......................4:00 p.m. Eastern Time                       

- ----------
<FN>
<F1>Because certain of the Securities in certain Trusts may from time to time
under certain circumstances be sold or redeemed or will be called or mature in
accordance with their terms (including the call or sale of zero coupon bonds
at prices less than par value), there is no guarantee that the value of each
Unit at the respective Trust's termination will be equal to the Principal
Amount (Par Value) of Securities per Unit stated above.

<F2>Sales charges for the Trusts, expressed as a percentage of the Public Offering
Price per Unit and as a percentage of the aggregate offering price of the
Securities are set forth under "Public Offering--General" in Part II
of this Prospectus. In addition, purchasers of units of any two consecutive
series of a Trust may aggregate purchases of units of such series for purposes
of the sales charge reduction for quantity purchases, provided that at the
time of the initial purchase of units such purchaser submitted a purchase
order for at least 100 units that was partially unfulfilled due to a lack of
units of such Trust series available for sale at such time. The sales charge
reduction shall be applied to the subsequent purchase of units such that the
aggregate sales charge reduction applicable to both purchases will equal the
amount described in the table on page 12 of Prospectus Part II.

<F3>Anyone ordering Units for settlement after the First Settlement Date will pay
accrued interest from such date to the date of settlement (normally three
business days after order) less distributions from the Interest Account
subsequent to the First Settlement Date. For purchases settling on the First
Settlement Date, no accrued interest will be added to the Public Offering
Price. After the initial offering period, the Sponsor's Repurchase Price per
Unit will be determined as described under the caption "Public
Offering--Market for Units" in Part II of this Prospectus.
</TABLE>




   
IM-IT  
- --------------------------------------------------------------------------

General. The IM-IT consists of 14 issues of Securities. Three of the Bonds in
the IM-IT are general obligations of the governmental entities issuing them
and are backed by the taxing power thereof. The remaining issues are payable
from the income of a specific project or authority and are not supported by
the issuer's power to levy taxes. These issues are located in 9 states or
territories, divided by purpose of issues (and percentage of principal amount
to total IM-IT) as follows: Health Care, 2 (22%); Higher Education, 3 (21%);
General Obligations, 3 (18%); Water and Sewer, 1 (11%); Public Building, 1
(9%); General Purpose, 2 (8%); Retail Electric/Gas, 1 (6%) and Transportation,
1 (5%). No Bond issue has received a provisional rating. The dollar weighted
average maturity of the Bonds in the Trust is 28 years.

Tax Status. For a discussion of the Federal tax status of income earned on
IM-IT Trust Units, see "Federal Tax Status" in Part II of this
Prospectus.  



<TABLE>
<CAPTION>
                                                                                  Semi-     
Per Unit Information:                                                Monthly      Annual    
                                                                    ------------ -----------
<S>                                                                 <C>          <C>        
Calculation of Estimated Net Annual Unit Income <F1>:                                       
 Estimated Annual Interest Income per Unit......................... $     54.22  $    54.22 
 Less: Estimated Annual Expense per Unit <F2>...................... $      1.99  $     1.53 
 Less: Annual Premium on Portfolio Insurance per Unit..............          --          -- 
 Estimated Net Annual Interest Income per Unit..................... $     52.23  $    52.69 
Calculation of Estimated Interest Earnings per Unit:                                        
 Estimated Net Annual Interest Income per Unit..................... $     52.23  $    52.69 
 Divided by 12 and 2, respectively................................. $      4.35  $    26.35 
Estimated Daily Rate of Net Interest Accrual per Unit.............. $    .14509  $   .14637 
Estimated Current Return Based on Public Offering Price <F1><F3>...        5.22%       5.27%
Estimated Long-Term Return <F3>....................................        5.28%       5.33%
Estimated Initial Monthly Distribution (September 1996)............ $      2.03             
Estimated Initial Semi-annual Distribution (December 1996).........              $    15.22 
Estimated Normal Distribution per Unit <F3>........................ $      4.35  $    26.35 
</TABLE>

<TABLE>
<CAPTION>
<S>                              <C>                                                                                               
Trustee's Annual Fee <F1><F4>... $.91 and $.51 per $1,000 principal amount of Bonds, respectively, for those portions of the IM-IT 
                                 Trust under the monthly and semi-annual distribution plans                                        
Record and Computation Dates.... TENTH day of the month as follows: monthly--each month; semi-annual--June and December            
Distribution Dates.............. TWENTY-FIFTH day of the month as follows: monthly--each month; semi-annual--                      
                                 June and December

- ----------
<FN>
<F1>During the first year the Trustee will reduce its fee by approximately $.15
per Unit (which amount is the estimated interest to be earned per Unit prior
to the expected delivery dates for the "when, as and if issued" Bonds
included in this Trust). Should such estimated interest exceed such amount,
the Trustee will reduce its fee up to its annual fee. After the first year,
the Trustee's fee will be that amount indicated above. Estimated Annual
Interest Income per Unit will be increased to $54.37. Estimated Annual Expense
per Unit (excluding insurance) will be increased to $2.14 and $1.68 under the
monthly and semi-annual distribution plans, respectively; and Estimated Net
Annual Interest Income per Unit will remain the same as shown. See "
Estimated Current Returns and Estimated Long-Term Returns" in Part II of
this Prospectus.

<F2>Excluding insurance costs. The Estimated Annual Expenses are expected to
fluctuate periodically (see "Trust Administration--Fund Administration and
Expenses--Miscellaneous Expenses" in Part II of this Prospectus).

<F3>The Estimated Current Returns and Estimated Long-Term Returns are increased
for transactions entitled to a reduced sales charge. See "Unitholder
Explanations--Public Offering--General" in Part II of this Prospectus. For
a discussion of how these returns are calculated, see "Unitholder
Explanations--Estimated Current Returns and Estimated Long-Term Returns" 
in Part II of this Prospectus. These figures are based on estimated per Unit
cash flows. Estimated cash flows will vary with changes in fees and expenses,
with changes in current interest rates and with the principal prepayment,
redemption, maturity, call, exchange or sale of the underlying Securities. The
estimated cash flows for this Series are set forth under "Other
Matters--Estimated Cash Flows to Unitholders" .

<F4>Based on the size of the Trust on the Date of Deposit and assuming all
Unitholders had chosen the semi-annual distribution plan, the Trustee's
estimated annual fees for ordinary recurring services would initially amount
to $4,651. Assuming in the alternative that all Unitholders had elected the
monthly distribution plan, such fees would initially amount to $8,299.
</TABLE>

 



<TABLE>
INSURED MUNICIPALS INCOME TRUST
SERIES 377 (204TH INSURED MULTI-SERIES)
PORTFOLIO As of August 21, 1996
<CAPTION>
                  Name of Issuer, Title, Interest Rate and                                                    Offering             
Aggregate         Maturity Date of either Bonds Deposited or Bonds                 Redemption                 Price To             
Principal<F1>     Contracted for<F1><F5>                               Rating<F2>  Feature<F3>                IM-IT<F4>            
- ----------------- ------------------------------------------------- -------------- -------------------------- --------------       
<S>               <C>                                               <C>            <C>                        <C>
$      500,000    Pomona Public Financing Authority, California,                                                                   
                  1993 Refunding Revenue Bonds, Series L                                                                           
                  (Southwest Pomona Redevelopment Project) CapMAC                  2004 @ 102                                      
                  Insured  #5.75% Due 2/1/2020.....................            AAA 2014 @ 100 S.F.            $     493,750        
       830,000    Rhode Island Convention Center Authority,                                                                        
                  Refunding Revenue Bonds, Series 1993B (MBIA                      2003 @ 100                                      
                  Insured)  #5.00% Due 5/15/2020...................            AAA 2016 @ 100 S.F.                  742,228        
       200,000    California State University, Housing System                                                                      
                  Refunding Revenue Bonds, Series 1996 (FGIC                       2005 @ 102                                      
                  Insured)  5.90% Due 11/1/2021....................            AAA 2018 @ 100 S.F.                  202,608        
     1,000,000    Indiana Health Facility Financing Authority,                                                                     
                  Hospital Revenue Refunding and Improvement                                                                       
                  Bonds, Series 1995 (Community Hospitals                          2006 @ 102                                      
                  Projects) MBIA Insured  #5.70% Due 5/15/2022.....            AAA 2015 @ 100 S.F.                  978,590        
       200,000    Municipal Authority of Westmoreland County                                                                       
                  (Westmoreland County, Pennsylvania) Municipal                                                                    
                  Service Revenue Bonds, Series 1995A (FGIC                                                                        
                  Insured)  #0.00% Due 8/15/2022...................            AAA                                    44,918 <F6>
       140,000    McKeesport Area School District (Allegheny                                                                       
                  County, Pennsylvania) General Obligation Bonds,                                                                  
                  Series 1996B (FSA Insured)  #0.00% Due 10/1/2022.            AAA                                    31,213 <F6>
     1,000,000    County of Cook, Illinois, General Obligation                                                                     
                  Capital Improvement Bonds, Series 1996 (FGIC                     2006 @ 101                                      
                  Insured)  #5.875% Due 11/15/2022.................            AAA 2017 @ 100 S.F.                1,005,000        
       500,000    Metropolitan Transportation Authority, New York,                                                                 
                  Commuter Facilities Revenue Bonds (Grand Central                                                                 
                  Terminal) Series 1995-1 (FSA Insured)  #5.70%                    2005 @ 101                                      
                  Due 7/1/2024.....................................            AAA 2016 @ 100 S.F.                  494,230        
     1,000,000    City of Detroit, Michigan, Water Supply System                                                                   
                  Revenue Bonds, Second Lien Bonds, Series 1995A                   2005 @ 101                                      
                  (MBIA Insured)  #5.50% Due 7/1/2025..............            AAA 2016 @ 100 S.F.                  963,130        
       500,000    Erie City School District, Erie County,                                                                          
                  Pennsylvania, General Obligation Bonds, Series                   2006 @ 100                                      
                  1996A (MBIA Insured)  #5.75% Due 5/1/2026........            AAA 2023 @ 100 S.F.                  501,250        
     1,000,000    Rhode Island Health and Educational Building                                                                     
                  Corporation, Higher Education Facility Revenue                                                                   
                  Bonds, Rhode Island School of Design Issue,                      2006 @ 102                                      
                  Series 1996 (MBIA Insured)  #5.625% Due 6/1/2026.            AAA 2017 @ 100 S.F.                  978,390        


                  Name of Issuer, Title, Interest Rate and                                                    Offering             
Aggregate         Maturity Date of either Bonds Deposited or Bonds                                            Price To             
Principal<F1>     Contracted for<F1><F5>                               Rating<F2>  Redemption Feature<F3>     IM-IT<F4>            
- ----------------- ------------------------------------------------- -------------- -------------------------- --------------       
       750,000    Board of Supervisors of Louisiana State                                                                          
                  University and Agricultural and Mechanical                                                                       
                  College, Auxiliary Revenue Bonds, Series 1996                    2006 @ 102                                      
                  (MBIA Insured)**  #5.50% Due 7/1/2026............            AAA 2017 @ 100 S.F.                  721,935        
     1,000,000    Michigan State Hospital Finance Authority,                                                                       
                  Hospital Revenue Bonds (Sparrow Obligated Group)                                                                 
                  Series 1996   (MBIA Insured)**  5.90% Due                        2006 @ 102                                      
                  11/15/2026.......................................            AAA 2017 @ 100 S.F.                1,009,210        
       500,000    Klickitat County, Washington, Public Utility                                                                     
                  District No. 1, Electric Revenue Bonds (FGIC                     2005 @ 101                                      
                  Insured)  #5.75% Due 10/1/2027...................            AAA 2016 @ 100 S.F.                  496,250        
    $9,120,000                                                                                                $   8,662,702        
=================                                                                                             ==============       
</TABLE>

- ----------
All of the Bonds in the portfolio are insured by one of the Preinsured Bond
Insurers as indicated in the Bond name. See "Unitholder
Explanations--Insurance on the Bonds in the Insured Trusts" in Part II of
this Prospectus.

For an explanation of the footnotes used on this page, see "Notes to
Portfolios" .






PENNSYLVANIA IM-IT TRUST  
- --------------------------------------------------------------------------

General. The Pennsylvania IM-IT Trust consists of 9 issues of Securities. Four
of the Bonds in the Pennsylvania IM-IT Trust are general obligations of the
governmental entities issuing them and are backed by the taxing power thereof.
The remaining issues are payable from the income of a specific project or
authority and are not supported by the issuer's power to levy taxes. These
issues are divided by purpose of issues (and percentage of principal amount to
total Pennsylvania IM-IT Trust) as follows: General Obligations, 4 (34%);
Health Care, 2 (30%); Higher Education, 1 (17%); Water and Sewer, 1 (10%) and
General Purpose, 1 (9%). No Bond issue has received a provisional rating.

Risk Factors. Investors should be aware of certain factors that might affect
the financial conditions of the Commonwealth of Pennsylvania. Pennsylvania
historically has been identified as a heavy industry state although that
reputation has changed recently as the industrial composition of the
Commonwealth diversified when the coal, steel and railroad industries began to
decline. A more diversified economy was necessary as the traditionally strong
industries in the Commonwealth declined due to a long-term shift in jobs,
investment and workers away from the northeast part of the nation. The major
sources of growth in Pennsylvania are in the service sector, including trade,
medical and the health services, education and financial institutions.
Pennsylvania's agricultural industries are also an important component of the
Commonwealth's economic structure, accounting for more than $3.6 billion in
crop and livestock products annually, while agribusiness and food related
industries support $39 billion in economic activity annually. 

Non-agricultural employment in the Commonwealth declined by 5.1 percent during
the recessionary period from 1980 to 1983. In 1984, the declining trend was
reversed as employment grew by 2.9 percent over 1983 levels. From 1983 to
1990, Commonwealth employment continued to grow each year, increasing an
additional 14.3 percent. For the three years ended 1993, unemployment in the
Commonwealth declined 1.2 percent. 

Back to back recessions in the early 1980s reduced the manufacturing sector's
employment levels moderately during 1980 and 1981, sharply during 1982, and
even further in 1983. Non-manufacturing employment has increased steadily
since 1980 to its 1993 level of 81.6 percent of total Commonwealth employment.
Consequently, manufacturing employment constitutes a diminished share of total
employment within the Commonwealth. Manufacturing, contributing 18.4 percent
of 1993 non-agricultural employment, has fallen behind both the services
sector and the trade sector as the largest single source of employment within
the Commonwealth. In 1993 the services sector accounted for 29.9 percent of
all non-agricultural employment while the trade sector accounted for 22.4
percent. 

From 1983 to 1989, Pennsylvania's annual average unemployment rate dropped
from 11.8 percent to 4.5 percent, falling below the national rate in 1986 for
the first time in over a decade. Pennsylvania's annual average unemployment
rate remained below the national average from 1986 until 1990. Slower economic
growth caused the unemployment rate in the Commonwealth to rise to 6.9 percent
in 1991 and 7.5 percent in 1992. The resumption of faster economic growth
resulted in a decrease in the Commonwealth's unemployment rate to 7.1 percent
in 1993. As of March 1995, the seasonally adjusted unemployment rate for the
Commonwealth was 6.0 percent compared to 5.5 percent for the United States. 

The five year period from fiscal 1990 through fiscal 1994 was marked by public
health and welfare costs growing at a rate double the growth rate for all the
state expenditures. Rising caseloads, increased utilization of services and
rising prices joined to produce the rapid rise of public health and welfare
costs at a time when a national recession caused tax revenues to stagnate and
even decline. During the period from fiscal 1989 through fiscal 1993, public
health and welfare costs rose by an average annual rate of 9.4 percent while
tax revenues were growing at an average annual rate of 5.8 percent.
Consequently, spending on other budget programs was restrained to a growth
rate below 4.7 percent and sources of revenues other than taxes became larger
components of fund revenues. Among those sources are transfers from other
funds and hospital and nursing home pooling of contributions to use as federal
matching funds. 

Tax revenues declined in fiscal 1991 as a result of the recession in the
economy. A $2.7 billion tax increase enacted for fiscal 1992 brought financial
stability to the General Fund. That tax increase included several taxes with
retroactive effective dates which generated some one-time revenues during
fiscal 1992. The absence of those revenues in fiscal 1993 contributed to the
decline in tax revenues shown for fiscal 1993. Fiscal 1994 revenues increased
4.1 percent, but a decline in other revenues caused by the end of medical
assistance pooled financing in fiscal 1993 held total revenues to a 1.8
percent gain. Expenditures for fiscal 1994 rose by 4.3 percent.

It should be noted that the creditworthiness of obligations issued by local
Pennsylvania issuers may be unrelated to the creditworthiness of obligations
issued by the Commonwealth of Pennsylvania, and there is no obligation on the
part of the Commonwealth to make payment on such local obligations in the
event of default. 

Financial information for the principal operating funds of the Commonwealth is
maintained on a budgetary basis of accounting. A budgetary basis of accounting
is used for the purpose of ensuring compliance with the enacted operating
budget and is governed by applicable statutes of the Commonwealth and by
administrative procedures. The Commonwealth also prepares annual financial
statements in accordance with generally accepted accounting principles ("
GAAP" ). The budgetary basis financial information maintained by the
Commonwealth to monitor and enforce budgetary control is adjusted at fiscal
year-end to reflect appropriate accruals for financial reporting in conformity
with GAAP. 

Fiscal 1992 Financial Results. GAAP Basis: During fiscal 1992 the General Fund
reported a $1.1 billion operating surplus. This operating surplus was achieved
through legislated tax rate increases and tax base broadening measures enacted
in August 1991 and by controlling expenditures through numerous cost reduction
measures implemented throughout the fiscal year. As a result of the fiscal
1992 operating surplus, the fund balance increased to $87.5 million and the
unreserved-undesignated deficit dropped to $138.6 million from its fiscal 1991
level of $1,146.2 million. 

Budgetary Basis: Total revenues for the fiscal year were $14,516.8 million, a
$2,654.5 million increase over cash revenues during fiscal 1991. Largely due
to the tax revisions enacted for the budget, corporate tax receipts totalled
$3,761.2 million, up from $2,656.3 million in fiscal 1991, sales tax receipts
increased by $302 million to $4,499.7 million, and personal income tax
receipts totalled $4,807.4 million, an increase of $1,443.8 million over
receipts in fiscal 1991. 

Spending increases in the fiscal 1992 budget were largely accounted for by
increases for education, social services and corrections programs.
Commonwealth funds for the support of public schools were increased by 9.8
percent to provide a $438 million increase to $4.9 billion for fiscal 1992.
Child welfare appropriations supporting county operated child welfare programs
were increased $67 million, more than 31.5 percent over fiscal 1991. Other
social service areas such as medical and cash assistance also received
significant funding increases as costs rose quickly as a result of the
economic recession and high inflation rates of medical care costs. The costs
of corrections programs, reflecting the marked increase in the prisoner
population, increased by 12 percent. Economic development efforts, largely
funded from bond proceeds in fiscal 1991, were continued with General Fund
appropriations for fiscal 1992. 

The budget included the use of several Medicaid pooled financing transactions.
These pooling transactions replaced $135 million of Commonwealth funds,
allowing total spending under the budget to increase by an equal amount. 

Fiscal 1993 Financial Results. GAAP Basis: The fund balance of the General
Fund increased by $611.4 million during the fiscal year, led by an increase in
the unreserved balance of $576.8 million over the prior fiscal year balance.
At June 30, 1993, the fund balance totalled $698.9 and the
unreserved/undesignated balance totalled $64.4 million. The increase in the
fund balance and a return to a positive unreserved-undesignated balance
provided indication of a continuing recovery of the Commonwealth's financial
condition. 

Budgetary Basis: The 1993 fiscal year closed with revenues higher than
anticipated and expenditures about as projected, resulting in an ending
unappropriated balance surplus (prior to the ten percent transfer to the Tax
Stabilization Reserve Fund) of $242.3 million, slightly higher than estimated.
Cash revenues were $41.5 million above the budget estimate and totalled
$14.633 billion representing less than a one percent increase over revenues
for the 1992 fiscal year. A reduction in the personal income tax rate in July
1992 and the one-time receipt of revenues from retroactive corporate tax
increases in fiscal 1992 were responsible, in part, for the low revenue growth
in fiscal 1993. 

Appropriations less lapses totalled $13.870 billion representing a 1.1 percent
increase over expenditures during fiscal 1992. The low growth in spending is a
consequence of a low rate of revenue growth, significant one-time expenses
during fiscal 1992, increased tax refund reserves to cushion against adverse
decisions on pending litigations, and the receipt of federal funds for
expenditures previously paid out of Commonwealth funds. 

By state statute, ten percent of the budgetary basis unappropriated surplus at
the end of a fiscal year is to be transferred to the Tax Stabilization Reserve
Fund. The transfer for the fiscal 1993 balance was $24.2 million. The
remaining unappropriated surplus of $218.0 million was carried forward into
the 1994 fiscal year. 

Fiscal 1994 Financial Results. GAAP Basis: The fund balance increased $194.0
million due largely to an increased reserve for encumbrances and an increase
in other designated funds. The unreserved-undesignated balance increased by
$14.8 million to $72.2 million. Revenues and other sources increased by 1.8
percent over the prior fiscal year while expenditures and other uses increased
by 4.3 percent. Consequently, the operating surplus declined to $179.4 million
for fiscal 1994 from $686.3 million for fiscal 1993. 

Budgetary Basis: Commonwealth revenues during the fiscal year totalled
$15,210.7 million, $38.6 million above the fiscal year estimate, and 3.9
percent over Commonwealth revenues during the previous fiscal year. The sales
tax was an important contributor to the higher than estimated revenues.
Collections from the sales tax were $5.124 billion, a 6.1 percent increase
from the prior fiscal year and $81.3 million above estimate. The strength of
collections from the sales tax offset the lower than budgeted performance of
the personal income tax which ended the fiscal year $74.4 million below
estimate. The shortfall in the personal income tax was largely due to
shortfalls in income not subject to withholding such as interest, dividends
and other income. Tax refunds in fiscal 1994 were reduced substantially below
the $530 million amount provided in fiscal 1993. The higher fiscal 1993 amount
and the reduced fiscal 1994 amount occurred because reserves of approximately
$160 million were added to fiscal 1993 tax refunds to cover potential payments
if the Commonwealth lost litigation known as Philadelphia Suburban Corp v.
Commonwealth. Those reserves were carried into fiscal 1994 until the
litigation was decided in the Commonwealth's favor in December 1993 and
$147.3 million of reserves for tax refunds were released.

Expenditures, excluding pooled financing expenditures and net of all fiscal
1994 appropriation lapses, totalled $14,934.4 million representing a 7.2
percent increase over fiscal 1993 expenditures. Medical assistance and
corrections spending contributed to the rate of spending growth for the fiscal
year.

The Commonwealth maintained an operating balance on a budgetary basis for
fiscal 1994 producing a fiscal year ending unappropriated surplus of $335.8
million. By state statute, ten percent ($33.6 million) of that surplus
transferred to the Tax Stabilization Reserve Fund and the remaining balance
was carried over into the fiscal 1995 fiscal year. The balance in the Tax
Stabilization Reserve Fund as of March 31, 1995 was $65.3 million.

Fiscal 1995 Budget. The approved fiscal 1995 budget provided for $15,665.7
million of appropriations from Commonwealth funds, an increase of 4.0 percent
over appropriations, including supplemental appropriations, for fiscal 1994.
Medical assistance expenditures represent the largest single increase in the
budget ($221 million) representing a nine percent increase over the prior
fiscal year. The budget includes a reform of the state-funded public
assistance program that added certain categories of eligibility to the program
but also limited the availability of such assistance to other eligible
persons. Education subsidies to local school districts were increased by
$132.2 million to continue the increased funding for the poorest school
districts in the state.

Several tax reductions were enacted with the fiscal 1995 budget. Low income
working families will benefit from an increase to the dependent exemption to
$3,000 from $1,500 for the first dependent and from $1,000 for all additional
dependents. A reduction to the corporate net income tax rate from 12.25
percent to 9.99 percent to be phased in over a period of four years was
enacted. A net operating loss provision has been added to the corporate net
income tax and will be phased in over three years with an annual $500,000 cap
on losses used to offset profits. Several other tax changes to the sales tax,
the inheritance tax and the capital stock and franchise tax also were enacted.
Estimated commonwealth revenue reductions from these tax cuts have been raised
from $166.4 million to $173.4 million based on upward revised estimates of
commonwealth revenues for the fiscal 1995 to 6.3 percent, excluding the effect
of the fiscal 1995 tax reductions, and is largely due to actual and
anticipated higher collections of the corporate net income tax, the sales and
use tax and miscellaneous collections.

After a review of the fiscal 1994 budget in January 1995, $64.9 million of
additional appropriation needs were identified for the fiscal year. Of this
amount, the largest are for medical assistance ($21.8 million) and general
assistance cash grants ($10.3 million). The balance of the additional
appropriation needs are for other public welfare programs, educational
subsidies and office relocation costs due to a fire. The supplemental
appropriations requested are proposed to be funded from appropriation lapses
estimated to total $172 million for the fiscal year.

With the revised estimates for revenues, appropriations and lapses for the
1994 fiscal year, an unappropriated balance prior to transfers to the Tax
Stabilization Reserve Fund of $395.5 million is projected, an increase from
the $335.8 million fiscal year 1993 ending balance (prior to transfers).

Fiscal 1996 Budget. The fiscal 1996 budget was approved by the Governor on
June 30, 1995. The budget includes spending growth of 2.7%. It includes a
reduction of the Corporate Net Income Tax from 10.99% to 9.99% retroactive to
January 1, 1995. The budget includes a proportionate increase in funds for
public safety and education and a proportionate decrease in funds for welfare.

Fiscal 1997 Budget. The fiscal 1997 budget was approved by the Governor on
June 29, 1996. The budget increases the Rainy Day Fund -- Pennsylvania's "
savings account" to protect against future tax increases -- to a balance
of $209 million. The budget includes a $15 million Job Creation Tax Credit
intended to help create more jobs for Pennsylvanians. The budget offers $138
million in increased funding and savings for local school districts including
the Link to Learn technology-in-schools program which is a $40.3 million
initiative designed to make computer resources available in Pennsylvania
classrooms. 

All outstanding general obligation bonds of the Commonwealth are rated AA- by
S&P and A1 by Moody's. 

Any explanation concerning the significance of such ratings must be obtained
from the rating agencies. There is no assurance that any ratings will continue
for any period of time or that they will not be revised or withdrawn. 

The City of Philadelphia ("Philadelphia" ) is the largest city in the
Commonwealth, with an estimated population of 1,585,577 according to the 1990
Census. Philadelphia functions both as a city of the first class and a county
for the purpose of administering various governmental programs. 

For the fiscal year ending June 30, 1991, Philadelphia experienced a
cumulative General Fund balance deficit of $153.5 million. The audit findings
for the fiscal year ending June 30, 1992, placed the Cumulative General Fund
balance deficit at $224.9. 

Legislation providing for the establishment of the Pennsylvania
Intergovernmental Cooperation Authority ("PICA" ) to assist first class
cities in remedying fiscal emergencies was enacted by the General Assembly and
approved by the Governor in June, 1991. PICA is designed to provide assistance
through the issuance of funding debt to liquidate budget deficits and to make
factual findings and recommendations to the assisted city concerning its
budgetary and fiscal affairs. An intergovernmental cooperation agreement
between Philadelphia and PICA was approved by City Council on January 3, 1992,
and approved by the PICA Board and signed by the Mayor on January 8, 1992. At
this time, Philadelphia is operating under a five year fiscal plan approved by
PICA on April 30, 1996 in which Philadelphia projects a balanced budget in
each of the five years (fiscal years 1997 through 2001) covered by the plan. 

In June 1992, PICA issued $474,555,000 of its Special Tax Revenue Bonds (the
"1992 Bonds" ) to provide financial assistance to Philadelphia and to
liquidate the cumulative General Fund balance deficit. PICA issued
$643,430,000 in July 1993 and $178,675,000 in August 1993 of Special Tax
Revenue Bonds to refund certain general obligation bonds of the City and to
fund additional capital projects. In December 1994, PICA issued $122,020,000
of Special Tax Revenue Bonds ("the 1994 Bonds" ) to fund additional
capital projects.  In May 1996, PICA issued $343,030,000 of Special Tax
Revenue Refunding Bonds to (i) advance refund the 1992 Bonds and the 1994
Bonds; (ii) pay the premium for a surety bond to satisfy the Debt Service
Reserve Fund Requirement for the 1996 Bonds, and; (iii) pay the costs of
issuing the 1996 Bonds.

As of the date hereof, the ratings on the City's long-term obligations
supported by payments from the City's General Fund are rated Baa by Moody's
and BBB- by S&P. Any explanation concerning the significance of such ratings
must be obtained from the rating agencies. There is no assurance that any
ratings will continue for any period of time or that they will not be revised
or withdrawn. 

The foregoing information constitutes only a brief summary of some of the
financial difficulties which may impact certain issuers of bonds and does not
purport to be a complete or exhaustive description of all adverse conditions
to which the issuers of the Bonds in the Pennsylvania IM-IT Trust are subject.
Additionally, many factors including national economic, social and
environmental policies and conditions, which are not within the control of the
issuers of Bonds, could have an adverse impact on the financial condition of
the State and various agencies and political subdivisions located in the
State. The Sponsor is unable to predict whether or to what extent such factors
or other factors may affect the issuers of Bonds, the market value or
marketability of the Bonds or the ability of the respective issuers of the
Bonds acquired by the Pennsylvania IM-IT Trust to pay interest on or principal
of the Bonds. 

Tax Status. For a discussion of the Federal tax status of income earned on
Pennsylvania IM-IT Trust Units, see "Federal Tax Status" in Part II of
this Prospectus. 

In the opinion of Saul, Ewing, Remick & Saul, counsel to the Fund for
Pennsylvania tax matters, under existing law: 

(1)Units evidencing fractional undivided interest in the Pennsylvania IM-IT
Trust, to the extent represented by obligations issued by the Commonwealth of
Pennsylvania, any public authority, commission, board or other agency created
by the Commonwealth of Pennsylvania, any political subdivision of the
Commonwealth of Pennsylvania or any public authority created by any such
political subdivision, are not taxable under any of the personal property
taxes presently in effect in Pennsylvania; 

(2)Distributions of interest income to Unitholders that would not be taxable
if received directly by a Pennsylvania resident are not subject to personal
income tax under the Pennsylvania Tax Reform Code of 1971; nor will such
interest be taxable under the Philadelphia School District Investment Income
Tax imposed on Philadelphia resident individuals; 

(3)A Unitholder will have a taxable event under the Pennsylvania state and
local income tax referred to in the preceding paragraph upon the redemption or
sale of his Units;

(4)Units are subject to Pennsylvania inheritance and estate taxes; 

(5)A Unitholder which is a corporation will have a taxable event under the
Pennsylvania Corporate Net Income Tax upon the redemption or sale of its
Units. Interest income distributed to Unitholders which are corporations is
not subject to Pennsylvania Corporate Net Income Tax or Mutual Thrift
Institutions Tax. However, banks, title insurance companies and trust
companies may be required to take the value of Units into account in
determining the taxable value of their shares subject to Shares Tax;

(6)Gains derived by the Pennsylvania IM-IT Trust from the sale, exchange or
other disposition of Bonds may be subject to Pennsylvania personal or
corporate income taxes. Those gains which are distributed by the Pennsylvania
IM-IT Trust to Unitholders who are individuals may be subject to Pennsylvania
Personal Income Tax. For Unitholders which are corporations, the distributed
gains may be subject to Corporate Net Income Tax or Mutual Thrift Institutions
Tax. Gains which are not distributed by the Pennsylvania IM-IT Trust may
nevertheless be taxable to Unitholders if derived by the Pennsylvania IM-IT
Trust from the sale, exchange or other disposition of Bonds issued on or after
February 1, 1994. Gains which are not distributed by the Pennsylvania IM-IT
Trust will remain nontaxable to Unitholders if derived by the Pennsylvania
IM-IT Trust from the sale, exchange or other disposition of Bonds issued prior
to February 1, 1994;

(7)Any proceeds paid under insurance policies issued to the Trustee or
obtained by issuers or the underwriters of the Bonds, the Sponsor or others
which represent interest on defaulted obligations held by the Trustee will be
excludable from Pennsylvania gross income if, and to the same extent as, such
interest would have been so excludable if paid in the normal course by the
issuer of the defaulted obligations; and

(8)The Pennsylvania IM-IT Trust is not taxable as a corporation under
Pennsylvania tax laws applicable to corporations.

In rendering its opinion, Saul, Ewing, Remick & Saul has not, for timing
reasons, made an independent review of proceedings related to the issuance of
the Bonds. It has relied on Van Kampen American Capital Distributors, Inc. for
assurance that the Bonds have been issued by the Commonwealth of Pennsylvania
or by or on behalf of municipalities or other governmental agencies within the
Commonwealth. 



<TABLE>
<CAPTION>
                                                                                  Semi-     
Per Unit Information:                                                Monthly      Annual    
                                                                    ------------ -----------
<S>                                                                 <C>          <C>        
Calculation of Estimated Net Annual Unit Income <F1>:                                       
 Estimated Annual Interest Income per Unit......................... $     54.08  $    54.08 
 Less: Estimated Annual Expense per Unit <F2>...................... $      2.30  $     1.86 
 Less: Annual Premium on Portfolio Insurance per Unit..............          --          -- 
 Estimated Net Annual Interest Income per Unit..................... $     51.78  $    52.22 
Calculation of Estimated Interest Earnings per Unit:                                        
 Estimated Net Annual Interest Income per Unit..................... $     51.78  $    52.22 
 Divided by 12 and 2, respectively................................. $      4.32  $    26.11 
Estimated Daily Rate of Net Interest Accrual per Unit.............. $    .14385  $   .14505 
Estimated Current Return Based on Public Offering Price <F1><F3>...        5.18%       5.22%
Estimated Long-Term Return <F3>....................................        5.18%       5.22%
Estimated Initial Monthly Distribution (September 1996)............ $      2.01             
Estimated Initial Semi-annual Distribution (January 1997)..........              $    19.44 
Estimated Normal Distribution per Unit <F3>........................ $      4.32  $    26.11 
</TABLE>

<TABLE>
<CAPTION>
<S>                              <C>                                                                                            
Trustee's Annual Fee <F1><F4>... $.91 and $.51 per $1,000 principal amount of Bonds, respectively, for those portions of the    
                                 Pennsylvania IM-IT Trust under the monthly and semi-annual distribution plans                  
Record and Computation Dates.... TENTH day of the month as follows: monthly--each month; semi-annual--January and July          
Distribution Dates.............. TWENTY-FIFTH day of the month as follows: monthly--each month; semi-annual--                   
                                 January and July                                                                               

- ----------
<FN>
<F1>During the first year the Trustee will reduce its fee by approximately $.06
per Unit (which amount is the estimated interest to be earned per Unit prior
to the expected delivery dates for the "when, as and if issued" Bonds
included in this Trust). Should such estimated interest exceed such amount,
the Trustee will reduce its fee up to its annual fee. After the first year,
the Trustee's fee will be that amount indicated above. Estimated Annual
Interest Income per Unit will be increased to $54.14. Estimated Annual Expense
per Unit (excluding insurance) will be increased to $2.36 and $1.92 under the
monthly and semi-annual distribution plans, respectively; and Estimated Net
Annual Interest Income per Unit will remain the same as shown. See "
Estimated Current Returns and Estimated Long-Term Returns" in Part II of
this Prospectus.

<F2>Excluding insurance costs. The Estimated Annual Expenses are expected to
fluctuate periodically (see "Trust Administration--Fund Administration and
Expenses--Miscellaneous Expenses" in Part II of this Prospectus).

<F3>The Estimated Current Returns and Estimated Long-Term Returns are increased
for transactions entitled to a reduced sales charge. See "Unitholder
Explanations--Public Offering--General" in Part II of this Prospectus. For
a discussion of how these returns are calculated, see "Unitholder
Explanations--Estimated Current Returns and Estimated Long-Term Returns" 
in Part II of this Prospectus. These figures are based on estimated per Unit
cash flows. Estimated cash flows will vary with changes in fees and expenses,
with changes in current interest rates and with the principal prepayment,
redemption, maturity, call, exchange or sale of the underlying Securities. The
estimated cash flows for this Series are set forth under "Other
Matters--Estimated Cash Flows to Unitholders" .

<F4>Based on the size of the Trust on the Date of Deposit and assuming all
Unitholders had chosen the semi-annual distribution plan, the Trustee's
estimated annual fees for ordinary recurring services would initially amount
to $1,510. Assuming in the alternative that all Unitholders had elected the
monthly distribution plan, such fees would initially amount to $2,694.
</TABLE>





<TABLE>
PENNSYLVANIA INSURED MUNICIPALS INCOME TRUST
SERIES 222 (204TH INSURED MULTI-SERIES)
PORTFOLIO As of August 21, 1996
<CAPTION>
                                                                                                              Offering             
                                                                                                              Price To             
                                                                                                              Pennsylvania         
Aggregate        Name of Issuer, Title, Interest Rate and Maturity Date of                 Redemption         IM-IT                
Principal<F1>    either Bonds Deposited or Bonds Contracted for<F1><F5>        Rating<F2>  Feature<F3>        Trust<F4>            
- ---------------- ---------------------------------------------------------- -------------- ------------------ --------------       
<S>              <C>                                                        <C>            <C>                <C>
$    300,000     City of Philadelphia, Pennsylvania, Water and Wastewater                                                          
                 Revenue Bonds, Series 1995 (MBIA Insured)  #5.60% Due                     2005 @ 102                              
                 8/1/2018..................................................            AAA 2015 @ 100 S.F.    $     295,917        
     500,000     Northeastern Pennsylvania Hospital and Education                                                                  
                 Authority, University Revenue Bonds, Series 1993 (Wilkes                  2004 @ 102                              
                 University)   FSA Insured  #5.625% Due 10/1/2018..........            AAA 2012 @ 100 S.F.          494,695        
     250,000     Pennsylvania Intergovernmental Cooperation Authority,                                                             
                 Special Tax Revenue Refunding Bonds (City of Philadelphia                                                         
                 Funding Program) Series 1996 (FGIC Insured)  #5.50% Due                   2006 @ 100                              
                 6/15/2020.................................................            AAA 2017 @ 100 S.F.          243,175        
     100,000     McKeesport Area School District (Allegheny County,                                                                
                 Pennsylvania) General Obligation Bonds, Series 1996B (FSA                                                         
                 Insured)  #0.00% Due 10/1/2022............................            AAA                            22,306 <F6>
     100,000     School District of Philadelphia, Pennsylvania, Unlimited                                                          
                 Tax-General Obligation Bonds, Series 1995B (AMBAC                         2005 @ 101                              
                 Indemnity Insured)  #5.50% Due 9/1/2025...................            AAA 2019 @ 100 S.F.           97,263        
     310,000     McKeesport Area School District (Allegheny County,                                                                
                 Pennsylvania) General Obligation Bonds, Series 1996C (FSA                 2006 @ 100                              
                 Insured)  #6.00% Due 10/1/2025............................            AAA 2023 @ 100 S.F.          315,034        
     500,000     Allegheny County Hospital Development Authority                                                                   
                 (Allegheny County, Pennsylvania) Hospital Revenue Bonds,                                                          
                 Series 1996A (South Hills Health System) MBIA Insured                     2006 @ 102                              
                 #5.875% Due 5/1/2026......................................            AAA 2022 @ 100 S.F.          506,445        
     500,000     Erie City School District, Erie County, Pennsylvania,                                                             
                 General Obligation Bonds, Series 1996A (MBIA Insured)                     2006 @ 100                              
                 #5.75% Due 5/1/2026.......................................            AAA 2023 @ 100 S.F.          502,085        
     400,000     Allegheny County Hospital Development Authority                                                                   
                 (Allegheny County, Pennsylvania) Hospital Revenue Bonds,                                                          
                 Series 1996 (Pittsburgh Mercy Health System, Inc.) AMBAC                  2006 @ 102                              
                  Indemnity Insured**  #5.625% Due 8/15/2026...............            AAA 2019 @ 100 S.F.          393,208        
$  2,960,000                                                                                                  $   2,870,128        
================                                                                                              ==============       
</TABLE>


- ----------
All of the Bonds in the portfolio are insured by one of the Preinsured Bond
Insurers as indicated in the Bond name. See "Unitholder
Explanations--Insurance on the Bonds in the Insured Trusts" in Part II of
this Prospectus.

For an explanation of the footnotes used on this page, see "Notes to
Portfolios" .
    


NOTES TO PORTFOLIOS

   
As of the Date of Deposit: August 21, 1996
- --------------------------------------------------------------------------

(1) All Securities are represented by "regular way" or "when
issued" contracts for the performance of which an irrevocable letter of
credit, obtained from an affiliate of the Trustee, has been deposited with the
Trustee. At the Date of Deposit, Securities may have been delivered to the
Sponsor pursuant to certain of these contracts; the Sponsor has assigned to
the Trustee all of its right, title and interest in and to such Securities.
Contracts to acquire Securities were entered into during the period from
August 7,1996 to August 20,1996. These Securities have expected settlement
dates ranging from August 21,1996 to September 5,1996 (see "Unitholder
Explanations" in Part II of this Prospectus).
    
(2) All ratings are by Standard & Poor's unless otherwise indicated. "*" 
 indicates that the rating of the Bond is by Moody's. The ratings represent
the latest published ratings by the respective rating agency or, if not
published, represent private letter ratings or those ratings expected to be
published by the respective rating agency. "Y" indicates that such
rating is contingent upon physical receipt by the respective ratings agency of
a policy of insurance obtained by the issuer of the bonds involved and issued
by the Preinsured Bond Insurer named in the bond's title. A commitment for
insurance in connection with these bonds has been issued by the Preinsured
Bond Insurer named in the bond's title. "N/R" indicates that the
applicable rating service did not provide a rating for that particular
Security. For a brief description of the rating symbols and their related
meanings, see "Description of Ratings" in Part II of this Prospectus.

(3) There is shown under this heading the year in which each issue of Bonds is
initially or currently callable and the call price for that year. Each issue
of Bonds continues to be callable at declining prices thereafter (but not
below par value) except for original issue discount bonds which are redeemable
at prices based on the issue price plus the amount of original issue discount
accreted to redemption date plus, if applicable, some premium, the amount of
which will decline in subsequent years. "S.F." indicates a sinking
fund is established with respect to an issue of Bonds. Certain Bonds may be
subject to redemption without premium prior to the date shown pursuant to
extraordinary optional or mandatory redemptions if certain events occur. For a
general discussion of certain of these events, see "Unitholder
Explanations--Risk Factors" in Part II of this Prospectus. Distributions
will generally be reduced by the amount of the income which would otherwise
have been paid with respect to redeemed Securities and there will be
distributed to Unitholders the principal amount and any premium received on
such redemption. The Estimated Current Return and Estimated Long-Term Return
in this event may be affected by such redemptions. For the Federal tax effect
on Unitholders of such redemptions and resultant distributions, see "
Federal Tax Status" in Part II of this Prospectus.

(4) Evaluation of Securities is made on the basis of current offering prices
for the Securities. The offering prices are greater than the current bid
prices of the Securities which is the basis on which Unit value is determined
for purposes of redemption of Units (see "Unitholder Explanations--Public
Offering--Offering Price" in Part II of this Prospectus).

(5) Other information regarding the Bonds in each Trust, as of the Date of
Deposit, is as follows: 



<TABLE>
<CAPTION>
                                                           Annual                   
                      Annual                    Profit     Interest    Bid Side     
                      Insurance   Cost to       (Loss) to  Income to   Evaluation   
Trust                 Cost        Sponsor       Sponsor    Trust       of  Bonds    
                      ----------- ------------- ---------- ----------- -------------
<S>                   <C>         <C>           <C>        <C>         <C>          
   
IM-IT................ $--         $   8,602,520 $   60,182 $   495,300 $   8,595,517
Pennsylvania IM-IT... $--         $   2,850,327 $   19,801 $   163,400 $   2,848,303
    
</TABLE>




The Bonds in the Insured Trusts are insured as follows: 


   
<TABLE>
<CAPTION>
                      Bonds insured           Bonds insured                                 
                      under AMBAC             under Financial                               
Trust                 Indemnity               Guaranty                Preinsured    Total   
                      portfolio insurance     portfolio insurance     Bonds                 
                      ----------------------- ----------------------- ------------- --------
<S>                   <C>                     <C>                     <C>           <C>     
IM-IT................ --                      --                      100%          100%    
Pennsylvania IM-IT... --                      --                      100%          100%    
</TABLE>

The breakdown of the Preinsured Bond Insurers is as follows: IM-IT--Financial
Guaranty 21%, MBIA 67%, FSA 7% and CapMAC 5%; Pennsylvania IM-IT Trust--AMBAC
Indemnity 17%, Financial Guaranty 8%, MBIA 44% and FSA 31%.
    


The Sponsor may have entered into contracts which hedge interest rate
fluctuations on certain Bonds in certain Portfolios. The cost of any such
contracts and the corresponding gain or loss is included in the Cost to
Sponsor. Certain Securities in the Fund, if any, marked by a double asterisk
(**), have been purchased on a "when, as and if issued" or "
delayed delivery" basis. Interest on these Securities begins accruing to
the benefit of Unitholders on their respective dates of delivery. Delivery is
expected to take place at various dates after the First Settlement Date as
follows: 


   
<TABLE>
<CAPTION>
                      Percent of                                            
                      Aggregate Principal    Range of Days Subsequent to    
Trust                 Amount                 First Settlement Date          
                      ---------------------- -------------------------------
<S>                   <C>                    <C>                            
IM-IT................          19%                     2 to 9 days
Pennsylvania IM-IT...          14%                          3 days
</TABLE>


On the Date of Deposit, the offering side evaluations of the Securities in the
IM-IT and Pennsylvania IM-IT Trusts were higher than the bid side evaluations
of such Securities by 0.74% and 0.74%, respectively, of the aggregate
principal amounts of such Securities.
    
"#" indicates that such Bond was issued at an original issue discount.
The tax effect of Bonds issued at an original issue discount is described in
"Federal Tax Status" in Part II of this Prospectus.

   
(6) This Bond has been purchased at a deep discount from the par value because
there is little or no stated interest income thereon. Bonds which pay no
interest are normally described as "zero coupon" bonds. Over the life
of bonds purchased at a deep discount the value of such bonds will increase
such that upon maturity the holders of such bonds will receive 100% of the
principal amount thereof. To the extent that zero coupon bonds are sold or
called prior to maturity, there is no guarantee that the value of the proceeds
received therefrom by the Trust will equal or exceed the par value that would
have been obtained at maturity of such zero coupon bonds. Approximately 4% and
3% of the aggregate principal amount of the Securities in the IM-IT and
Pennsylvania IM-IT Trust, respectively, are "zero coupon" bonds. See
"Unitholder Explanations--Settlement of Bonds in the Trusts--Risk
Factors" in Part II of this Prospectus for a discussion of zero coupon
bonds.
    
     



REPORT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS
   
To the Board of Directors of Van Kampen American Capital Distributors, Inc.
and the Unitholders of Insured Municipals Income Trust, 204th Insured
Multi-Series (IM-IT and Pennsylvania IM-IT Trusts):

We have audited the accompanying statements of condition and the related
portfolios of Insured Municipals Income Trust, 204th Insured Multi-Series
(IM-IT and Pennsylvania IM-IT Trusts) as of August 21, 1996. The statements of
condition and portfolios are the responsibility of the Sponsor. Our
responsibility is to express an opinion on such financial statements based on
our audit.
    
We conducted our audit in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. Our
procedures included confirmation of irrevocable letters of credit deposited to
purchase tax-exempt securities by correspondence with the Trustee. An audit
also includes assessing the accounting principles used and significant
estimates made by the Sponsor, as well as evaluating the overall financial
statement presentation. We believe our audit provides a reasonable basis for
our opinion.
   
In our opinion, the financial statements referred to above present fairly, in
all material respects, the financial position of Insured Municipals Income
Trust, 204th Insured Multi-Series (IM-IT and Pennsylvania IM-IT Trusts) as of
August 21, 1996, in conformity with generally accepted accounting principles.
    




Chicago, Illinois                                     GRANT THORNTON LLP
   
August 21, 1996
    



<TABLE>
INSURED MUNICIPALS INCOME TRUST
   
204th INSURED MULTI-SERIES
    
Statements of Condition
   
As of August 21, 1996

<CAPTION>
INVESTMENT IN SECURITIES                                                  Pennsylvania 
                                                            IM-IT         IM-IT Trust  
                                                            ------------- -------------
<S>                                                         <C>           <C>          
Contracts to purchase tax-exempt securities <F1><F2><F3>... $   8,662,702 $   2,870,128
Accrued interest to the First Settlement Date <F1><F3>.....        84,551        40,724
                                                            ------------- -------------
Total...................................................... $   8,747,253 $   2,910,852
                                                            ============= =============
LIABILITY AND INTEREST OF UNITHOLDERS                                                  
Liability--
 Accrued interest payable to Sponsor <F1><F3>               $      84,551 $      40,724
Interest of Unitholders--
Cost to investors <F4>.....................................     9,109,000     3,018,000
Less: Gross underwriting commission <F4>...................       446,298       147,872
                                                            ------------- -------------
Net interest to Unitholders <F1><F3><F4>...................     8,662,702     2,870,128
                                                            ------------- -------------
Total...................................................... $   8,747,253 $   2,910,852
                                                            ============= =============
    
==========
<FN>
<F1>The aggregate value of the Securities listed under "Portfolio" for
each Trust herein, and their cost to such Trust are the same. The value of the
Securities is determined by Interactive Data Corporation on the bases set
forth under "Unitholder Explanations--Public Offering--Offering Price" 
in Part II of this Prospectus. The contracts to purchase tax-exempt Securities
are collateralized by irrevocable letters of credit which have been deposited
with the Trustee in and for the following amounts: 
</TABLE>




<TABLE>
<CAPTION>
                                          Principal     Offering      Accrued         
                            Amount of     Amount of     Price of      Interest to     
                            Letter of     Bonds Under   Bonds Under   Expected        
                            Credit        Contracts     Contracts     Delivery  Dates 
                            ------------- ------------- ------------- ----------------
<S>                         <C>           <C>           <C>           <C>             
   
IM-IT...................... $8,743,997    $9,120,000    $8,662,702    $81,295         
Pennsylvania IM-IT Trust... $2,909,206    $2,960,000    $2,870,128    $39,078         
    
<FN>
<F2>Insurance coverage providing for timely payment, when due, of all principal
and interest on the Bonds in the Insured Trusts has been obtained either by
such Trusts, by a prior owner of the Bonds, by the Sponsor prior to the
deposit of such Bonds or by the issuers of the Bonds involved. Such insurance
does not guarantee the market value of the Bonds or the value of the Units.
The insurance obtained by the Insured Trusts is effective only while Bonds
thus insured are held in such Trusts. Neither the bid nor offering prices of
the underlying Bonds or of the Units, absent situations in which bonds are in
default in payment of principal or interest or in significant risk of such
default, include value, if any, attributable to the insurance obtained by such
Trusts.
   
<F3>The Trustee will advance to the Trust the amount of net interest accrued to
August 26, 1996, the First Settlement Date, for distribution to the Sponsor as
the Unitholder of record as of the First Settlement Date.
    
<F4>The aggregate public offering price (exclusive of interest) and the aggregate
sales charge are computed on the bases set forth under "Unitholder
Explanations--Public Offering--Offering Price" and "Trust
Administration--General--Sponsor and Underwriter Compensation" in Part II
of this Prospectus and assume all single transactions involve less than 100
Units. For single transactions involving 100 or more Units, the sales charge
is reduced (see "Unitholder Explanations--Public Offering--General" in
Part II of this Prospectus) resulting in an equal reduction in both the Cost
to investors and the Gross underwriting commission while the Net interest to
Unitholders remains unchanged.
</TABLE>





EQUIVALENT TAXABLE ESTIMATED CURRENT RETURN TABLES
- --------------------------------------------------------------------------

As of the date of this Prospectus, the following tables show the approximate
taxable estimated current returns for individuals that are equivalent to
tax-exempt estimated current returns under combined Federal and State taxes
(where applicable) using the published Federal and State tax rates (where
applicable) scheduled to be in effect in 1996. They incorporate increased tax
rates for higher income taxpayers that were included in the Revenue
Reconciliation Act of 1993. These tables illustrate approximately what you
would have to earn on taxable investments to equal the tax-exempt estimated
current return in your income tax bracket. The table assumes that Federal
taxable income is equal to State income subject to tax, and for cases in which
more than one State rate falls within a Federal bracket, the State rate
corresponding to the highest income within that Federal bracket is used. The
combined State and Federal tax rates shown reflect the fact that State tax
payments are currently deductible for Federal tax purposes. The table does not
reflect any local taxes or any taxes other than personal income taxes. The
tables do not show the approximate taxable estimated current returns for
individuals that are subject to the alternative minimum tax. The taxable
equivalent estimated current returns may be somewhat higher than the
equivalent returns indicated in the following tables for those individuals who
have adjusted gross incomes in excess of $117,950. The tables do not reflect
the effect of Federal or State limitations (if any) on the amount of allowable
itemized deductions and the deduction for personal or dependent exemptions or
any other credits. These limitations were designed to phase out certain
benefits of these deductions for higher income taxpayers. These limitations,
in effect, raise the marginal maximum Federal tax rate to approximately 44
percent for taxpayers filing a joint return and entitled to four personal
exemptions and to approximately 41 percent for taxpayers filing a single
return entitled to only one personal exemption. These limitations are subject
to certain maximums, which depend on the number of exemptions claimed and the
total amount of the taxpayer's itemized deductions. For example, the
limitation on itemized deductions will not cause a taxpayer to lose more than
80% of his allowable itemized deductions, with certain exceptions. See "
Federal Tax Status" in Part II of this Prospectus for a more detailed
discussion of recent Federal tax legislation, including a discussion of
provisions affecting corporations.


   
IM-IT


<TABLE>
<CAPTION>
Taxable Income ($1,000's)                                                             Tax-Exempt Estimated Current Return 
             Single               Joint    Tax                                                                          
             Return              Return  Bracket      5%    5 1/2%     6%     6 1/2%         7%      7 1/2%      8% 
                                                                              Equivalent Taxable Estimated Current Return 
- --------------------------------------- -------  -------------------------------------------------------------------------
<S>                 <C>                 <C>      <C>     <C>          <C>     <C>          <C>      <C>          <C>      
$        0 -  24.00 $        0 -  40.10      15%    5.88%        6.47%   7.06%        7.65%    8.24%        8.82%    9.41%
     24.00 -  58.15      40.10 -  96.90      28     6.94         7.64    8.33         9.03     9.72        10.42    11.11 
     58.15 - 121.30      96.90 - 147.70      31     7.25         7.97    8.70         9.42    10.14        10.87    11.59 
    121.30 - 263.75     147.70 - 263.75      36     7.81         8.59    9.38        10.16    10.94        11.72    12.50 
        Over 263.75         Over 263.75    39.6     8.28         9.11    9.93        10.76    11.59        12.42    13.25 
</TABLE>




PENNSYLVANIA



<TABLE>
<CAPTION>
Taxable Income ($1,000's)                                                              Tax-Exempt Estimated Current Return 
             Single               Joint      Tax                                                                           
             Return              Return  Bracket      5%    5 1/2%      6%      6 1/2%          7%     7 1/2%        8% 
                                                                               Equivalent Taxable Estimated Current Return 
- --------------------------------------- -------- --------------------------------------------------------------------------
<S>                 <C>                 <C>      <C>     <C>          <C>      <C>          <C>      <C>          <C>      
$        0 -  24.00 $        0 -  40.10    17.4%    6.05%        6.66%    7.26%        7.87%    8.47%        9.08%    9.69%
     24.00 -  58.15      40.10 -  96.90      30     7.14         7.86     8.57         9.29    10.00        10.71    11.43 
     58.15 - 121.30      96.90 - 147.70    32.9     7.45         8.20     8.94         9.69    10.43        11.18    11.92 
    121.30 - 263.75     147.70 - 263.75    37.8     8.04         8.84     9.65        10.45    11.25        12.06    12.86 
        Over 263.75         Over 263.75    41.3     8.52         9.37    10.22        11.07    11.93        12.78    13.63 
</TABLE>
    

A comparison of tax-free and equivalent taxable estimated current returns with
the returns on various taxable investments is one element to consider in
making an investment decision. The Sponsor may from time to time in its
advertising and sales materials compare the then current estimated returns on
the Trusts and returns over specified periods on other similar Van Kampen
American Capital sponsored unit investment trusts with inflation rates and
with returns on taxable investments such as corporate or U.S. Government
bonds, bank CDs and money market accounts or money market funds, each of which
has investment characteristics that may differ from those of the Trusts. U.S.
Government bonds, for example, are backed by the full faith and credit of the
U.S. Government and bank CDs and money market accounts are insured by an
agency of the federal government. Money market accounts and money market funds
provide stability of principal, but pay interest at rates that vary with the
condition of the short-term debt market. The investment characteristics of the
Trusts are described more fully elsewhere in this Prospectus.




ESTIMATED CASH FLOWS TO UNITHOLDERS 
- --------------------------------------------------------------------------

The tables below set forth the per Unit estimated monthly and semi-annual
distributions of interest and principal to Unitholders. The tables assume no
changes in expenses, no changes in the current interest rates, no exchanges,
redemptions, sales or prepayments of the underlying Securities prior to
maturity or expected retirement date and the receipt of principal upon
maturity or expected retirement date. To the extent the foregoing assumptions
change actual distributions will vary.


   
IM-IT

Monthly


<TABLE>
<CAPTION>
                                                Estimated     Estimated    Estimated   
Distribution Dates                              Interest      Principal    Total       
(Each Month)                                    Distribution  Distribution Distribution
- ----------------------------------------------- ------------- ------------ ------------
<S>           <C>      <C>             <C>      <C>           <C>          <C>         
September     1996                              $      2.03                $     2.03  
October       1996     - April         2006            4.35                      4.35  
May           2006                                     4.28   $    54.89        59.17  
June          2006     - October       2007            4.10                      4.10  
November      2007                                     4.07        21.95        26.02  
December      2007     - November      2008            3.99                      3.99  
December      2008                                     3.12       219.57       222.69  
January       2009     - January       2020            2.94                      2.94  
February      2020                                     2.87        54.89        57.76  
March         2020     - May           2020            2.69                      2.69  
June          2020                                     2.38        91.11        93.49  
July          2020     - May           2022            2.32                      2.32  
June          2022                                     1.90       109.79       111.69  
July          2022     - August        2022            1.81                      1.81  
September     2022                                     1.81        21.95        23.76  
October       2022                                     1.81        15.37        17.18  
November      2022     - June          2024            1.81                      1.81  
July          2024                                     1.74        54.89        56.63  
August        2024     - June          2025            1.56                      1.56  
July          2025                                     1.42       109.78       111.20  
August        2025     - May           2026            1.08                      1.08  
June          2026                                      .93       109.79       110.72  
July          2026                                      .47        82.33        82.80  
August        2026     - September     2027             .21                       .21  
October       2027                                      .13        54.89        55.02  
</TABLE>




IM-IT (continued)

Semi-annual



<TABLE>
<CAPTION>
Distribution Dates                             Estimated      Estimated    Estimated   
(Each June and December                        Interest       Principal    Total       
Unless Otherwise Indicated)                    Distribution   Distribution Distribution
- ---------------------------------------------- -------------- ------------ ------------
<S>           <C>      <C>            <C>      <C>            <C>          <C>         
December      1996                             $      15.22                $    15.22  
June          1997     - December     2005            26.35                     26.35  
May           2006                                            $    54.89        54.89  
June          2006                                    26.01                     26.01  
December      2006     - June         2007            24.80                     24.80  
November      2007                                                 21.95        21.95  
December      2007                                    24.67                     24.67  
June          2008                                    24.17                     24.17  
December      2008                                    23.29       219.57       242.86  
June          2009     - December     2019            17.84                     17.84  
February      2020                                                 54.89        54.89  
June          2020                                    16.42        91.11       107.53  
December      2020     - December     2021            14.07                     14.07  
June          2022                                    13.64       109.79       123.43  
September     2022                                                 21.95        21.95  
October       2022                                                 15.37        15.37  
December      2022     - June         2024            11.01                     11.01  
July          2024                                                 54.89        54.89  
December      2024                                     9.67                      9.67  
June          2025                                     9.49                      9.49  
July          2025                                                109.78       109.78  
December      2025                                     6.88                      6.88  
June          2026                                     6.38       109.79       116.17  
July          2026                                                 82.33        82.33  
December      2026                                     1.55                      1.55  
June          2027                                     1.30                      1.30  
October       2027                                      .79        54.89        55.68  
</TABLE>






Pennsylvania IM-IT Trust

Monthly



<TABLE>
<CAPTION>
                                                Estimated     Estimated    Estimated   
Distribution Dates                              Interest      Principal    Total       
(Each Month)                                    Distribution  Distribution Distribution
- ----------------------------------------------- ------------- ------------ ------------
<S>           <C>      <C>             <C>      <C>           <C>          <C>         
September     1996                              $      2.01                $     2.01  
October       1996     - April         2006            4.32                      4.32  
May           2006                                     4.08   $   165.67       169.75  
June          2006     - September     2006            3.54                      3.54  
October       2006                                     3.39       102.71       106.10  
November      2006     - April         2008            3.04                      3.04  
May           2008                                     2.81       165.68       168.49  
June          2008     - July          2018            2.26                      2.26  
August        2018                                     2.12        99.40       101.52  
September     2018                                     1.81                      1.81  
October       2018                                     1.58       165.67       167.25  
November      2018     - June          2020            1.05                      1.05  
July          2020                                      .74        82.84        83.58  
August        2020     - September     2022             .68                       .68  
October       2022                                      .68        33.13        33.81  
November      2022     - August        2025             .68                       .68  
September     2025                                      .64        33.14        33.78  
October       2025     - August        2026             .54                       .54  
September     2026                                      .04       132.54       132.58  
</TABLE>




Semi-annual



<TABLE>
<CAPTION>
Distribution Dates                            Estimated      Estimated    Estimated   
(Each January and July                        Interest       Principal    Total       
Unless Otherwise Indicated)                   Distribution   Distribution Distribution
- --------------------------------------------- -------------- ------------ ------------
<S>           <C>      <C>           <C>      <C>            <C>          <C>         
January       1997                            $      19.44                $    19.44  
July          1997     - January     2006            26.11                     26.11  
May           2006                                           $   165.67       165.67  
July          2006                                   24.32                     24.32  
October       2006                                               102.71       102.71  
January       2007                                   19.79                     19.79  
July          2007     - January     2008            18.43                     18.43  
May           2008                                               165.68       165.68  
July          2008                                   16.61                     16.61  
January       2009     - July        2018            13.67                     13.67  
August        2018                                                99.40        99.40  
October       2018                                               165.67       165.67  
January       2019                                    8.76                      8.76  
July          2019     - January     2020             6.39                      6.39  
July          2020                                    6.08        82.84        88.92  
January       2021     - July        2022             4.16                      4.16  
October       2022                                                33.13        33.13  
January       2023     - July        2025             4.16                      4.16  
September     2025                                                33.14        33.14  
January       2026                                    3.53                      3.53  
July          2026                                    3.28                      3.28  
September     2026                                     .59       132.54       133.13  
</TABLE>
    





UNDERWRITING
- --------------------------------------------------------------------------

The Underwriters named below have severally purchased Units in the following
respective amounts from the Sponsor. For additional information regarding the
Underwriters, including information relating to compensation and benefits
received by the Underwriters, see "Unitholder
Explanations--Underwriting" in Part II of this Prospectus.  

   
<TABLE>
<CAPTION>
Name                                                                                                                 IM-IT
                                            Address                                                                  Units
                                                                                                                 ---------
<S>                                         <C>                                                                  <C>      
Van Kampen American Capital Dist., Inc.     One Parkview Plaza, Oakbrook Terrace, Illinois 60181                    4,484 
A.G. Edwards & Sons, Inc.                   One North Jefferson Avenue, St. Louis, Missouri 63103                   1,000 
Southwest Securities Inc.                   1201 Elm Street, Suite 4300, Dallas, Texas 75270                          275 
Dean Witter Reynolds, Incorporated          2 World Trade Center, 59th Floor, New York, New York 10048                250 
J.J.B. Hilliard, W.L. Lyons, Inc.           501 South Fourth Street, Louisville, Kentucky 40202                       250 
Edward D. Jones & Co.                       201 Progress Parkway, Maryland Heights, Missouri  63043                   250 
Peacock, Hislop, Staley, & Given, Inc.      122 North Kirkwood Road, St. Louis, Missouri 63122                        250 
Pershing DIV of DLJ Secs Corp.              One Pershing Plaza, 7th Floor, Jersey City, New Jersey 07399              250 
Principal Financial Securities, Inc.        Fountain Place, 1445 Ross Avenue, Suite 2300, Dallas, Texas 75201         250 
Prudential Securities Inc.                  1 New York Plaza, 14th Floor, New York, New York 10292-2014               250 
Roosevelt & Cross Inc.                      20 Exchange Place, New York, New York 10005                               250 
Stifel, Nicolaus & Company, Incorporated    500 North Broadway, St. Louis, Missouri 63102                             250 
Advest, Inc.                                90 State House Square, Hartford, Connecticut 06103                        100 
Robert W. Baird & Co. Inc.                  777 East Wisconsin Avenue, Milwaukee, Wisconsin 53202                     100 
J.C. Bradford & Co.                         330 Commerce Street, Nashville, Tennessee 37201                           100 
Butler, Wick & Co., Inc.                    City Center One, Suite 700, P.O. Box 149, Youngstown, Ohio 44501          100 
EVEREN Securities, Inc.                     77 West Wacker Drive, 28th Floor, Chicago, Illinois 60601                 100 
First Miami Securities                      20660 West Dixie Highway, North Miami Beach, Florida 33180                100 
Gruntal & Co., Incorporated                 14 Wall Street, New York, New York 10005                                  100 
Oppenheimer & Co., Inc.                     World Financial Center, 8th Floor, New York, New York 10281               100 
Raymond James & Associates, Inc.            880 Carillon Parkway, St. Petersburg, Florida 33733                       100 
US Clearing Corp.                           26 Broadway, New York, New York 10004                                     100 
B.C. Ziegler and Company                    215 North Main Street, West Bend, Wisconsin 53095                         100 
                                                                                                                    9,109 
                                                                                                                 =========
</TABLE>




 



<TABLE>
<CAPTION>
                                                                                                                 Pennsylvania 
Name                                                                                                              IM-IT Trust
                                           Address                                                                   Units
                                                                                                                --------------
<S>                                        <C>                                                                  <C>           
Van Kampen American Capital Dist., Inc.    One Parkview Plaza, Oakbrook Terrace, Illinois 60181                           968 
Dean Witter Reynolds, Incorporated         2 World Trade Center, 59th Floor, New York, New York 10048                     250 
Legg Mason Wood Walker, Inc.               111 South Calvert Street, Baltimore, Maryland 21202                            250 
Parker/Hunter, Incorporated                600 Grant Street, Pittsburgh, Pennsylvania 15219                               250 
Pershing DIV of DLJ Secs Corp.             One Pershing Plaza, 7th Floor, Jersey City, New Jersey 07399                   250 
Prudential Securities Inc.                 1 New York Plaza, 14th Floor, New York, New York 10292-2014                    250 
Advest, Inc.                               90 State House Square, Hartford, Connecticut 06103                             100 
Gruntal & Co., Incorporated                14 Wall Street, New York, New York 10005                                       100 
Janney Montgomery Scott Inc.               1801 Market Street, 11th Floor, Philadelphia, Pennsylvania 19103               100 
W.H. Newbold's Son & Co.                  1500 Walnut Street, Philadelphia, Pennsylvania 19102                            100 
Roosevelt & Cross Inc.                     20 Exchange Place, New York, New York 10005                                    100 
Smith Barney Inc.                          388 Greenwich Street, 23rd Floor, New York, New York 10013                     100 
US Clearing Corp.                          26 Broadway, New York, New York 10004                                          100 
Wheat First Butcher Singer                 River Front Plaza, 901 East Byrd Street, Richmond, Virginia 23219              100 
                                                                                                                        3,018 
                                                                                                                ==============
</TABLE>
    



No person is authorized to give any information or to make any representations
not contained in this Prospectus; and any information or representation not
contained herein must not be relied upon as having been authorized by the
Fund, the Sponsor or the Underwriters. This Prospectus does not constitute an
offer to sell, or a solicitation of an offer to buy, securities in any state
to any person to whom it is not lawful to make such offer in such state.



<TABLE>
<CAPTION>
Title                                                     
Page                                                      
<S>                                                  <C>  
SUMMARY OF ESSENTIAL FINANCIAL INFORMATION           2    
IM-IT TRUST                                          3    
PENNSYLVANIA IM-IT TRUST                             6    
NOTES TO PORTFOLIOS                                  13   
OTHER MATTERS                                        15   
Report of Independent Certified Public Accountants   15   
Statements of Condition                              16   
Equivalent Taxable Estimated Current Return Tables   17   
Estimated Cash Flows to Unitholders                  19   
Underwriting                                         22   
</TABLE>



This Prospectus contains information concerning the Fund and the Sponsor, but
does not contain all of the information set forth in the registration
statements and exhibits relating thereto, which the Fund has filed with the
Securities and Exchange Commission, Washington, D.C., under the Securities Act
of 1933 and the Investment Company Act of 1940, and to which reference is
hereby made. 




PROSPECTUS

PART I
   
August 21, 1996



Insured Municipals Income Trust, 
  204th Insured Multi-Series





IM-IT 377

Pennsylvania IM-IT 222
    











A Wealth of Knowledge A Knowledge of Wealth(sm) 

VAN KAMPEN AMERICAN CAPITAL


One Parkview Plaza
Oakbrook Terrace, Illinois 60181
2800 Post Oak Boulevard
Houston, Texas 77056



This Part I of the Prospectus may not be distributed unless accompanied by
Part II. Both Parts of this Prospectus should be retained for future reference.

                   Contents of Registration Statement
     
     This  Amendment  of Registration Statement comprises  the  following
papers and documents:

     The facing sheet
     The Cross-Reference sheet
     The Prospectus
     The signatures
     The consents of independent public accountants, ratings
        services and legal counsel

The following exhibits:

1.1  Copy of Trust Agreement.

1.5  Copy of Agreement Among Underwriters.

3.1  Opinion  and  consent of counsel as to legality of securities  being
     registered.

3.2  Opinion  of  counsel as to Federal income tax status  of  securities
     being registered.

3.3  Opinion  and consent of counsel as to New York income tax status  of
     the Fund under New York law.

3.4  Opinion  and  consent  of  counsel  as  to  income  tax  status   to
     Pennsylvania residents of Units of the Pennsylvania IM-IT Trust.

4.1  Consent of Interactive Data Corp.

4.2  Consent of Standard & Poor's.

4.3  Consent of Grant Thornton LLP.

EX-27  Financial Data Schedules
        
                               Signatures
     
     The Registrant, Insured Municipals Income Trust, 204th Insured Multi-
Series  hereby identifies Insured Municipals Income Trust,  77th  Insured
Multi-Series  and Insured Municipals Income Trust and Investors'  Quality
Tax-Exempt  Trust,  Multi-Series 189 for purposes of the  representations
required  by  Rule  487  and  represents the  following:   (1)  that  the
portfolio  securities  deposited in the series as to  the  securities  of
which this Registration Statement is being filed do not differ materially
in  type  or  quality from those deposited in such previous  series;  (2)
that,  except to the extent necessary to identify the specific  portfolio
securities  deposited in, and to provide essential financial  information
for, the series with respect to the securities of which this Registration
Statement  is being filed, this Registration Statement does  not  contain
disclosures  that differ in any material respect from those contained  in
the  registration statements for such previous series  as  to  which  the
effective  date  was determined by the Commission or the staff;  and  (3)
that it has complied with Rule 460 under the Securities Act of 1933.
     
     Pursuant  to  the requirements of the Securities Act  of  1933,  the
Registrant,  Insured Municipals Income Trust, 204th Insured  Multi-Series
has duly caused this Amendment to the Registration Statement to be signed
on  its behalf by the undersigned, thereunto duly authorized, in the City
of Chicago and State of Illinois on the 21st day of August, 1996.

                                    Insured Municipals Income Trust
                                      204th Insured Multi-Series
                                    
                                    By Van Kampen American Capital
                                       Distributors, Inc.
                                    
                                    
                                    By Sandra A. Waterworth
                                       Vice President
     
     Pursuant  to  the requirements of the Securities Act of  1933,  this
Amendment  to  the Registration Statement has been signed  below  by  the
following persons in the capacities indicated and on August 21, 1996.

 Signature                 Title

Don G. Powell       Chairman and Chief Executive )
                      Officer                    )

William R. Rybak    Senior Vice President and    )
                      Chief Financial Officer    )

Ronald A. Nyberg    Director                     )

William R. Molinari Director                     )

                                                    Sandra A. Waterworth
                                                     (Attorney-in-fact*)

*An  executed  copy of each of the related powers of attorney  was  filed
with  the  Securities  and Exchange Commission  in  connection  with  the
Registration  Statement  on Form S-6 of Insured Municipals  Income  Trust
and  Investors' Quality Tax-Exempt Trust, Multi-Series 203 (File No.  33-
65744)  and  with  the  Registration Statement on  Form  S-6  of  Insured
Municipals  Income Trust, 170th Insured Multi-Series (File No.  33-55891)
and the same are hereby incorporated herein by this reference.

                                                           Exhibit 1.1


                     Insured Municipals Income Trust
                       204th Insured Multi-Series
                                    
                             Trust Agreement
                                    
                                                  Dated:  August 21, 1996
     
     This   Trust   Agreement   between  Van  Kampen   American   Capital
Distributors, Inc., as Depositor, American Portfolio Evaluation Services,
a  division of Van Kampen American Capital Investment Advisory Corp.,  as
Evaluator,  and  The  Bank of New York, as Trustee,  sets  forth  certain
provisions in full and incorporates other provisions by reference to  the
document entitled "Standard Terms and Conditions of Trust, For Van Kampen
American  Capital Distributors, Inc. Tax-Exempt Trust,  Dated  March  16,
1995"  (herein called the "Standard Terms and Conditions of Trust"),  and
such  provisions  as  are set forth in full and such  provisions  as  are
incorporated by reference constitute a single instrument.  All references
herein  to  Articles  and Sections are to Articles and  Sections  of  the
Standard Terms and Conditions of Trust.
                                    
                                    
                            Witnesseth That:
     
     In consideration of the premises and of the mutual agreements herein
contained, the Depositor and the Trustee agree as follows:
                                    
                                    
                                 Part I
                                    
                                    
                 Standard Terms and Conditions of Trust
     
     Subject  to  the  provisions of Part II hereof, all  the  provisions
contained  in  the  Standard Terms and Conditions  of  Trust  are  herein
incorporated by reference in their entirety and shall be deemed to  be  a
part  of  this instrument as fully and to the same extent as though  said
provisions had been set forth in full in this instrument.
                                    
                                    
                                 Part II
                                    
                                    
                  Special Terms and Conditions of Trust
     
     The following special terms and conditions are hereby agreed to:
     
          (a)    The  Bonds  defined in Section 1.01(4),  listed  in  the
     Schedules hereto, have been deposited in the Trusts under this Trust
     Agreement.
     
          (b)   The fractional undivided interest in and ownership of the
     various  Trusts represented by each Unit thereof is the  amount  set
     forth  under  "Summary of Essential Financial Information-Fractional
     Undivided Interest in the Trust per Unit" in Prospectus Part I.
     
          (c)    The approximate amounts, if any, which the Trustee shall
     be  required to advance out of its own funds and cause to be paid to
     the  Depositor pursuant to Section 3.05 shall be the amount per Unit
     that the Trustee agreed to reduce its fee or pay Trust expenses  set
     forth  in the footnotes to the "Per Unit Information" for each Trust
     in  Prospectus  Part  I  times the number of  units  in  such  Trust
     referred to in Part II (b) of this Trust Agreement.
     
         (d)   The First General Record Date and the amount of the second
     distribution of funds from the Interest Account of each Trust  shall
     be the record date for the Interest Account and the amount set forth
     under "Per Unit Information" for each Trust in Prospectus Part I.
     
          (e)    The  First Settlement Date shall be the date  set  forth
     under  "Summary of Essential Financial Information-First  Settlement
     Date" in Prospectus Part I.
     
          (f)    Any monies held to purchase "when issued" bonds will  be
     held in noninterest bearing accounts.
     
          (g)    The  Evaluation Time for purpose of  sale,  purchase  or
     redemption of Units shall be 4:00 P.M. Eastern time.
     
          (h)    As  set  forth  in Section 3.05, the  Record  Dates  and
     Distribution Dates for each Trust are those dates set forth  in  the
     section entitled "Per Unit Information" for each Trust as appears in
     Prospectus Part I.
     
          (i)    As  set  forth  in Section 3.15, the Evaluator's  Annual
     Supervisory  Fee  shall  be that amount set  forth  in  "Summary  of
     Essential Financial Information-Evaluator's Annual Supervisory  Fee"
     in Prospectus Part I.
     
          (j)    As  set  forth  in Section 4.03, the Evaluator's  Annual
     Evaluation Fee shall be that amount, and computed on that basis, set
     forth  in  "Summary  of  Essential Financial Information-Evaluator's
     Annual Evaluation Fee" in Prospectus Part I
     
          (k)    The  Trustee's annual compensation as  set  forth  under
     Section  6.04, under each distribution plan shall be that amount  as
     specified  in Prospectus Part Iunder the section entitled "Per  Unit
     Information"  for each Trust and will include a fee  to  induce  the
     Trustee to advance funds to meet scheduled distributions.
     
          (l)   The sixth paragraph of Section 3.05 is hereby revoked and
     replaced by the following paragraph:
          
                      Unitholders   desiring   to   receive   semi-annual
          distributions and who purchase their Units prior to the  Record
          Date  for  the  second distribution under the monthly  plan  of
          distribution  may  elect  at the time of  purchase  to  receive
          distributions on a semi-annual basis by notice to the  Trustee.
          Such  notice  shall  be  effective with respect  to  subsequent
          distributions until changed by further notice to  the  Trustee.
          Unitholders  desiring to receive semi-annual distributions  and
          who  purchse their Units prior to the Record Date for the first
          distribution  may  elect  at the time of  purchase  to  receive
          distributions on a semi-annual basis by notice to the  Trustee.
          Such  notice  shall  be  effective with respect  to  subsequent
          distributions until changed by further notice to  the  Trustee.
          Changes in the plan of distribution will become effective as of
          opening of business on the day after the next succeeding  semi-
          annual  Record Date and such distributions will continue  until
          further notice.
     
          (m)    Sections  8.02(d)  and 8.02(e) are  hereby  revoked  and
     replaced with the following:
          
               (d)    distribute  to each Unitholder of such  Trust  such
          holder's pro rata share of the balance of the Interest  Account
          of such Trust;
          
               (e)    distribute  to each Unitholder of such  Trust  such
          holder's pro rata share of the balance of the Principal Account
          of such Trust; and
          
          In  Witness  Whereof, Van Kampen American Capital Distributors,
     Inc.  has caused this Trust Agreement to be executed by one  of  its
     Vice  Presidents or Assistant Vice Presidents and its corporate seal
     to  be  hereto affixed and attested by its Secretary or one  of  its
     Vice   Presidents  or  Assistant  Secretaries,  American   Portfolio
     Evaluation  Services,  a  division of Van  Kampen  American  Capital
     Investment  Advisory  Corp., has caused  this  Trust  Indenture  and
     Agreement  to  be  executed by its President  or  one  of  its  Vice
     Presidents and its corporate seal to be hereto affixed and  attested
     to by its Secretary, its Assistant Secretary or one of its Assistant
     Vice  Presidents  and The Bank of New York, has  caused  this  Trust
     Agreement  to  be  executed by one of its Vice  Presidents  and  its
     corporate  seal to be hereto affixed and attested to by one  of  its
     Vice  Presidents, Assistant Vice Presidents or Assistant Treasurers;
     all as of the day, month and year first above written.

                                    Van Kampen American Capital
                                    Distributors, Inc.
                                    
                                    
                                    By  Sandra A. Waterworth
                                        Vice President
(Seal)

Attest:

By      Gina M. Scumaci
        Assistant Secretary

                                    American Portfolio Evaluation
                                       Services, a division of Van Kampen
                                       American Capital Investment
                                       Advisory Corp.
                                    
                                    
By      Dennis J. Mcdonnell
        President

(Seal)

Attest:

By      Scott E. Martin
        Secretary

                                    The Bank Of New York
                                    
                                    By  Jeffrey Bieselin
                                        Vice President
(Seal)

Attest:

By     Norbert Loney
       Assistant Treasurer


                      Schedules To Trust Agreement
                     Securities Initially Deposited
                                   In
       Insured Municipals Income Trust, 204th Insured Multi-Series

(Note:  Incorporated herein and made a part hereof as indicated below are
     the corresponding "Portfolios" of each of the Trusts as set forth in
     the Prospectus.)


                                                               Exhibit 1.5

                                                      Dated:  June 1, 1992

                                   
                                    
                   Master Agreement Among Underwriters
                 For Unit Investment Trusts Sponsored by
             Van Kampen American Capital Distributors, Inc.

Van Kampen American Capital Distributors, Inc.
One Parkview Plaza
Oakbrook Terrace, Illinois 60181

Gentlemen:

     1.   The Trust.  We understand that you, Van Kampen American Capital
Distributors, Inc. (the "Sponsor"), are entering into this agreement (the
"Agreement") in counterparts with us and other firms who  may  be
underwriters for issues of various series of unit investment trusts for
which you will act as Sponsor.  This Agreement shall apply to any
offering after May 1, 1992 of units of fractional undivided interest in
such various series unit investment trusts in which we elect to act as an
underwriter  (underwriters with respect to each such trust  being
hereinafter called "Underwriters") after receipt of a notice from you
stating the name and size of the trust and that our participation as an
Underwriter in the proposed offering shall be subject to the provisions
of this Agreement.  The issuer of the units of fractional undivided
interests in a series of a unit investment trust offered in any offering
of units made pursuant to this Agreement is hereinafter referred to as
the "Trust" and the reference to "Trust" in this Agreement applies only
to such Trust, and such units of such Trust offered are hereinafter
called the "Units".  Each Trust is or will be registered as a "unit
investment trust" under the Investment Company Act of 1940 (the "1940
Act") by appropriate filings with the Securities and Exchange Commission
(the "Commission").  Additionally, each Trust is or will be registered
with the Commission under the Securities Act of 1933 (the "1933 Act") on
Form S-6 or its successor forms, including a proposed form of prospectus
(the "Preliminary Prospectus").
     
     The registration statement as finally amended and revised at the
time it becomes effective is herein referred to as the "Registration
Statement" and the related prospectus is herein referred to as the
"Prospectus", except that if the prospectus filed by the Trust pursuant
to Rule 424(b) under the 1933 Act shall differ from the prospectus on
file at the time the Registration Statement shall become effective, the
term "Prospectus" shall refer to the prospectus filed pursuant to Rule
424(b) from and after the date on which it shall have been filed.
     
     The following provisions of this Agreement shall apply separately to
each individual offering of Units by a Trust.
     
     We understand that as of the date upon which we have agreed to
underwrite Units of the Trust the Commission shall not have issued any
order preventing or restraining the use of any Preliminary Prospectus
and, further, that each Preliminary Prospectus shall conform in all
material respects to the requirements of the 1933 Act and the Rules and
Regulations thereunder and, as of its date, shall not include any untrue
statement of a material fact or omit to state a material fact necessary
to make the statements therein not misleading; and when the Registration
Statement becomes effective, it and the Prospectus, and any amendments or
supplements thereto, will contain all statements that are required to be
stated therein in accordance with the 1933 Act and the Rules  and
Regulations thereunder and will in all material respects conform to the
requirements of the 1933 Act and the Rules and Regulations thereunder,
and neither the Registration Statement nor the Prospectus, nor any
amendment or supplement thereto, will contain any untrue statement of a
material fact or omit to state a material fact required to be stated
therein or necessary to make the statements therein not misleading;
provided, however, that you make no representation or warranty as to
information contained in or omitted from any Preliminary Prospectus, the
Registration  Statement, the Prospectus or any such amendment  or
supplement, in reliance upon and in conformity with, written information
furnished to you by or on behalf of any Underwriter specifically for use
in the preparation thereof.

     2.   Designation and Authority of Representative.  You are hereby
authorized to act as our representative (the "Representative") in
connection with all matters to which this Agreement relates and to take
the action provided herein to be taken by you as you may otherwise deem
necessary or advisable.  We understand that we have no obligations under
this Agreement with respect to any Trust in which we choose not to
participate as an Underwriter.
     
     You will be under no liability to us for any act or omission except
for obligations expressly assumed by you herein and no obligations on
your  part will be implied or inferred herefrom.  The rights  and
liabilities of the respective parties hereto are several and not joint,
and nothing herein or hereunder will constitute then a partnership,
association or separate entity.

     3.   Profit or Loss in Acquisition of Securities.  It is understood
that the acquisition of securities (the "Securities") for deposit in the
portfolio of the Trust shall be at your cost and risk.  We acknowledge
that you will share with us any net deposit profits in the amounts and to
the  extent,  if  any, indicated under "Sponsor  and  Underwriter
Compensation" in the Prospectus.  For the purposes of determining the
number of Units underwritten, we understand that we will be credited for
that number of Units set forth opposite our name in the section entitled
"Underwriting" in the prospectus.
     
     We agree that you shall have no liability (as Representative or
otherwise)  with  respect to the issue form, validity,  legality,
enforceability, value of, or title to the Securities, except for the
exercise of due care in determining the genuineness of such Securities
and the conformance thereof with the descriptions and qualifications
appearing in the Prospectus.

     4.   Purchase of Units.  Promptly after you make a determination to
offer Units of a Trust and you inquire as to whether we desire to
participate in such offering, we will advise you promptly as to the
number of Units which we will purchase or of our decision not  to
participate in such offering.  Such advice may be written or oral.  The
delivery to the Sponsor of a completed Schedule A to this Agreement shall
constitute adequate written advice.  Oral advice shall be binding but
shall be promptly confirmed in writing by us by means of telegraph,
telegram or other form of wire or facsimile transmission.  Such written
confirmation shall contain the information requested by Schedule A to
this Agreement.  You may rely on and we hereby commit on the terms and
conditions of this Agreement to purchase and pay for the number of Units
of the Trust set forth in such advice (the "Unit Commitment").  Our Unit
Commitment may be increased only by mutual agreement between us and you
at any time prior to the date as of which the Trust Agreement for the
Trust is executed (the "Date of Deposit").  We agree that you in your
sole discretion reserve the right to decrease our Unit Commitment at any
time prior to the Date of Deposit and if you so elect to make such a
decrease, you will notify us of such an election by telephone and
promptly confirm the same in writing.
     
     The price to be paid for such Units shall be the Public Offering
Price per Unit (as defined in the Prospectus) as first determined on the
Date of Deposit or such later determination on such Date of Deposit as
you shall advise us, less the sum per Unit indicated under "Sponsor and
Underwriter Compensation" in the Prospectus.  Further, each Underwriter
who underwrites that number of Units indicated under "Sponsor and
Underwriter Compensation" in the Prospectus will receive from the Sponsor
that additional compensation indicated under such section of  the
Prospectus for each Unit it underwrites, providing the Trust size is in
excess of that number of Units, if any, indicated under such section of
the Prospectus.  At the Date of Deposit, we will become the owner of the
Units and be entitled to the benefits (except for interest, if any,
accruing from the Date of Deposit to the First Settlement Date) as well
as the risks inherent therein.  We acknowledge that those persons, if
any, named in the Prospectus under "Sponsor and Underwriter Compensation"
are Managing or Co-Managing Underwriters of the Trust, as indicated
therein, and we acknowledge that those persons specifically named therein
will receive as additional compensation those respective per Unit amounts
set forth in such section of the Prospectus.
     
     You  are authorized to retain custody of our Units until the
Registration Statement relating thereto has become effective under the
1933 Act and you shall have received payment from us for such Units.
     
     You are authorized to file an amendment to said Registration
Statement describing the Securities and furnishing information based
thereon or relating thereto and any further amendments or supplements to
the Registration Statement or Prospectus which you may deem necessary or
advisable.  We will furnish to you upon your request such information as
will be required to insure that the Registration Statement and Prospectus
are current insofar as they relate to us and we thereafter continue to
furnish you with such information as may be necessary to keep current and
correct the information previously supplied.
     
     We understand that the Trust will also take action with respect to
the offering and sale of Units in accordance with the Blue Sky or
securities laws of certain states in which it is proposed that the Units
may be offered and sold.

     5.   Public Offering.  You agree that you will advise us promptly
when the Registration Statement has become effective, and we agree that
when we are advised that the Units are released for public offering, we
will make a public offering thereof by means of the Prospectus under the
1933 Act, as amended, which describes the deposit of Securities and
related information.  The Public Offering Price and the terms and
conditions of the public offering shall be as set forth in the Prospectus
and shall rely with respect to the offering price of the Securities upon
the determination of the Evaluator named in the Prospectus.  Public
advertisement of the offering, if any, shall be made by you on behalf of
the Underwriters on such date as you shall determine.  We agree that
before we use any Trust advertising material which we have created, we
will obtain your prior approval to use such advertising materials.

     6.   Public Offering Price.  We agree that each day while this
Agreement is in effect and the evaluation of the Trust is made by the
Evaluator named in the Prospectus, we will contact you  for  such
evaluation and of the resultant Public Offering Price for the purpose of
the offering and sale of the respective Units to the public.  We agree as
required by Section 22(d) of the 1940 Act to offer and sell our Units at
the current Public Offering Price described in the Prospectus.

     7.   Permitted Transactions.  It is agreed that part or all of the
Units purchased by us may be sold to dealers, or other entities with whom
we can legally grant a concession or agency commission, only at the then
effective Public Offering Price, less the concession described in the
Prospectus.
     
     From time to time prior to the termination of this Agreement, at
your Request, we will advise you of the number of our Units which remain
unsold and, at your request, we agree to deliver to you any of such
unsold Units to be sold for our account to retail accounts or, less the
concession or agency commission then effective, to dealers or others.
     
     If prior to the termination of this Agreement, or such earlier date
as you may determine and advise us thereof in writing, you shall purchase
or contract to purchase any of our Units or any Units issued in exchange
therefor, in the open market or otherwise, or if any such Units shall be
tendered to the Trustee for redemption because not effectively placed for
investment by us, we agree to repurchase such Units at a price equal to
the  total cost of such purchase, including accrued interest  and
commissions, if any, and transfer taxes on redelivery.  Regardless of the
amount paid on the repurchase of any such Units, it is agreed that they
may be resold by us only at the then effective Public Offering Price.
     
     Until the termination of this Agreement, we agree that we will make
no purchase of Units other than (i) purchases provided for in this
Agreement, (ii) purchases approved by you and (iii) purchases as broker
in executing unsolicited orders.

     8.   Compliance With Commission Order.  We hereby agree as follows:
(a) we will refund all sales charges to purchasers of Units from us or
any dealer participating in the distribution of Units who purchased such
Units from us if, within ninety days from the time that the Registration
Statement of the respective Units under the 1933 Act shall have become
effective, (i) the net worth of the trust shall be reduced to less than
20% of the principal amount of Securities originally deposited therein or
(ii) the Trust shall have been terminated; (b) you may instruct the
Trustee on the Date of Deposit that, in the event that redemption by any
Underwriters of Units constituting part of any unsold allotment of Units
shall result in the Trust having a net worth of less than 40% of the
principal amount of Securities originally deposited therein, the Trustee
shall terminate the Trust in the manner provided in the Trust Indenture
and  Agreement (as defined in the Prospectus) and distribute  the
Securities and other assets of the Trust pursuant to the provisions of
the Trust Indenture and Agreement; and (c) in the event that the Trust
shall have been terminated pursuant to (b) above, we will refund any
sales charges to any purchaser of such Units who purchased from us, or
purchased from a dealer participating in the distribution of such Units
who purchased such Units from us.  We authorize you to charge our account
for all refunds of sales charges in respect to our Units.

     9.   Substitution of Underwriters.  We authorize you to arrange for
the substitution hereunder of other persons, who may include you and us,
for all or any part of the commitment of any nondefaulting Underwriter
with the consent of such Underwriter, and of any defaulting Underwriter
without the consent thereof, upon such terms and conditions as you may
deem advisable, provided that the number of Units to be purchased by us
shall not be increased without our consent and that such substitution
shall not in any way affect the liability of any defaulting Underwriter
to the other Underwriters for damages from such default, nor relieve any
other Underwriter of any obligation under this Agreement.  The expenses
chargeable to the account of any defaulting Underwriter and not paid for
by it or by a person substituted for such Underwriter and any additional
losses or expenses arising from such default shall be considered to be
expenses under this Agreement and shall be charged against the accounts
of the nondefaulting Underwriters in proportion to their respective
commitments.

    10.   Termination.  This Agreement shall terminate with respect to
each Trust which we have agreed to underwrite 30 days after the date on
which  the public offering of the Units of such Trust is made  in
accordance with Section 5 hereof unless sooner terminated by you,
provided that you may extend this Agreement for not more than eleven
successive periods of 30 days each upon notice to us and each of the
other Underwriters.
     
     Notwithstanding any settlement on the termination of this Agreement,
we agree to pay our share of any amount payable on account of any claim,
demand or liability which may be asserted against the Underwriters, or
any of them, based on the claim that the Underwriters constitute an
association, unincorporated business or other separate entity and our
share of any expenses incurred by you in defending against any such
claim, demand or liability.  We also agree to pay any stamp taxes which
may be assessed and paid after such settlement on account of any Units
received or sold hereunder for our account.
     
     Notwithstanding any termination of this Agreement, no sales of the
Units shall be made by us at any time except in conformity with the
provisions of Section 22(d) of the 1940 Act.

    11.   Default by Other Underwriters.  Default by any one or more of
the other Underwriters in respect of their several obligations under this
Agreement shall neither release you nor us from any of our respective
obligations hereunder.

    12.   Notices.  Notices hereunder shall by deemed to have been duly
given if mailed or telegraphed to us at our address set forth below, in
the case of notices to us, or to you at your address set forth at the
head of this Agreement, in the case of notices to you.

    13.   Net Capital.  You represent that you, and we represent that we,
are  in  compliance with the capital requirements of Rule 15c-3-1
promulgated by the Commission under the Securities and Exchange Act of
1934, and we may, in accordance with and pursuant to such Rule 15c-3-1,
agree to purchase the amount of Units to be purchased by you and us,
respectively, under the Agreement.

    14.   Miscellaneous.  We confirm that we are a member in good
standing of the National Association of Securities Dealers, Inc.
     
     We confirm that we will take reasonable steps to provide the
Preliminary Prospectus or final Prospectus to any person making written
request therefor to us and to make the Preliminary Prospectus or the
final Prospectus available to each person associated with us expected to
solicit  customers' orders for the Units prior to  the  effective
registration date and the final Prospectus if he is expected to offer the
Units after the effective date.  We understand that you will supply us
upon our request with sufficient copies of such prospectuses to comply
with the foregoing.
     
     This Agreement is being executed by us and delivered to you in
duplicate.  Upon your confirmation hereof and of agreements in identical
form with each of the other Underwriters, this Agreement shall constitute
a valid and binding contract between us.
                                    
                                    Very truly yours,
                                    
                                    
                                    
                                    

Confirmed as of the date set forth at the head of this Agreement

Indicated below our firm name and address exactly as we wish to appear
in the Prospectus

VAN KAMPEN AMERICAN CAPITAL DISTRIBUTORS, INC.


By     _____________________________


Title  _____________________________

                                                         Exhibit 3.1

                           Chapman and Cutler
                         111 West Monroe Street
                        Chicago, Illinois  60603
                                    
                                    
                                    
                                    
                             August 21, 1996
                                    
                                    
                                    
Van Kampen American Capital Distributors, Inc.
One Parkview Plaza
Oakbrook Terrace, Illinois  60181
     
     
     Re:Insured Municipals Income Trust, 204th Insured Multi-Series

Gentlemen:
     
     We   have   served  as  counsel  for  Van  Kampen  American  Capital
Distributors, Inc., as Sponsor and Depositor of Insured Municipals Income
Trust,  204th  Insured  Multi-Series  (hereinafter  referred  to  as  the
"Fund"), in connection with the preparation, execution and delivery of  a
Trust Agreement dated August 21, 1996 between Van Kampen American Capital
Distributors, Inc., as Depositor, American Portfolio Evaluation Services,
a  division of Van Kampen American Capital Investment Advisory Corp.,  as
Evaluator,  and The Bank of New York, as Trustee, pursuant to  which  the
Depositor has delivered to and deposited Bonds listed in the Schedules to
the  Trust  Agreement with the Trustee and pursuant to which the  Trustee
has  issued  to  or  on  the  order of the  Depositor  a  certificate  or
certificates representing Units of fractional undivided interest  in  and
ownership of the several Trusts of said Fund (hereinafter referred to  as
the "Units") created under said Trust Agreement.
     
     In connection therewith, we have examined such pertinent records and
documents  and  matters of law as we have deemed necessary  in  order  to
enable us to express the opinions hereinafter set forth.
     
     Based upon the foregoing, we are of the opinion that:
     
           1.   The execution and delivery of the Trust Agreement and the
     execution and issuance of certificates evidencing the Units  in  the
     several Trusts of the Fund have been duly authorized; and
     
           2.    The  certificates evidencing the Units  in  the  several
     Trusts of the Fund when duly executed and delivered by the Depositor
     and   the  Trustee  in  accordance  with  the  aforementioned  Trust
     Agreement,  will  constitute valid and binding obligations  of  such
     Trusts and the Depositor in accordance with the terms thereof.
     
     We hereby consent to the filing of this opinion as an exhibit to the
Registration  Statement  (File  No.  333-08677)  relating  to  the  Units
referred to above and to the use of our name and to the reference to  our
firm in said Registration Statement and in the related Prospectus.
                                    Respectfully submitted,
                                    
                                    
                                    
                                    Chapman and Cutler

MJK/cjw

                                                        Exhibit 3.2

                           Chapman and Cutler
                         111 West Monroe Street
                        Chicago, Illinois  60603
                                    
                                    
                             August 21, 1996
                                    
                                    
                                    
Van Kampen American Capital Distributors, Inc.
One Parkview Plaza
Oakbrook Terrace, Illinois  60181

The Bank of New York
101 Barclay Street
New York, New York 10286
     
     
     Re:Insured Municipals Income Trust, 204th Insured Multi-Series

Gentlemen:
     
     We   have   acted  as  counsel  for  Van  Kampen  American   Capital
Distributors, Inc., Depositor of Insured Municipals Income  Trust,  204th
Insured  Multi-Series (the "Trust"), in connection with the  issuance  of
Units of fractional undivided interest in the several Trusts of said Fund
under  a  Trust Agreement dated August 21, 1996 (the "Indenture") between
Van  Kampen  American Capital Distributors, Inc., as Depositor,  American
Portfolio Evaluation Services, a division of Van Kampen American  Capital
Investment  Advisory Corp., as Evaluator, and The Bank of  New  York,  as
Trustee.
     
     In this connection, we have examined the Registration Statement, the
form  of Prospectus proposed to be filed with the Securities and Exchange
Commission, the Indenture and such other instruments and documents as  we
have   deemed   pertinent.   Based  upon  the  foregoing  and   upon   an
investigation of such matters of law as we consider to be applicable,  we
are of the opinion that, under existing Federal income tax law:
     
          (i)   Each Trust is not an association taxable as a corporation
     but will be governed by the provisions of subchapter J (relating  to
     trusts) of chapter 1, Internal Revenue Code of 1986 (the "Code").
     
         (ii)    Each Unitholder will be considered as owning a pro  rata
     share  of each asset of the respective Trust in the proportion  that
     the  number  of Units of such Trust held by him bears to  the  total
     number  of  Units  outstanding  of such  Trust.   Under  subpart  E,
     subchapter J of chapter 1 of the Code, income of each Trust will  be
     treated as income of each Unitholder of the respective Trust in  the
     proportion described, and an item of Trust income will have the same
     character in the hands of a Unitholder as it would have in the hands
     of  the  Trustee.  Accordingly, to the extent that the income  of  a
     Trust  consists  of interest and original issue discount  excludable
     from gross income under Section 103 of the Code, such income will be
     excludable from Federal gross income of the Unitholders,  except  in
     the  case  of  a Unitholder who is a substantial user (or  a  person
     related to such user) of a facility financed through issuance of any
     industrial development bonds or certain private activity bonds  held
     by  the  respective Trust.  In the case of such Unitholder  (and  no
     other)  interest received with respect to his Units attributable  to
     such industrial development bonds or such private activity bonds  is
     includable   in   his  gross  income.   In  the  case   of   certain
     corporations,  interest on the Bonds is included  in  computing  the
     alternative minimum tax pursuant to Section 56(c) of the  Code,  the
     environmental  tax (the "Superfund Tax") imposed by Section  59A  of
     the  Code, and the branch profits tax imposed by Section 884 of  the
     Code with respect to U.S. branches of foreign corporations.
     
        (iii)    Gain  or  loss will be recognized to a  Unitholder  upon
     redemption  or sale of his Units.  Such gain or loss is measured  by
     comparing the proceeds of such redemption or sale with the  adjusted
     basis   of  the  Units  represented  by  his  Certificate.    Before
     adjustment, such basis would normally be cost if the Unitholder  had
     acquired  his Units by purchase, plus his aliquot share of  advances
     by the Trustee to the Trust to pay interest on Bonds delivered after
     the  Unitholder's settlement date to the extent that  such  interest
     accrued  on  the  Bonds  during  the period  from  the  Unitholder's
     settlement  date  to  the  date such  Bonds  are  delivered  to  the
     respective Trust, but only to the extent that such advances  are  to
     be repaid to the Trustee out of interest received by such Trust with
     respect to such Bonds.  In addition, such basis will be increased by
     the  Unitholder's  aliquot  share  of  the  accrued  original  issue
     discount  (and market discount, if the Unitholder elects to  include
     market  discount in income as it accrues) with respect to each  Bond
     held  by the Trust with respect to which there was an original issue
     discount  at  the time the Bond was issued (or which  was  purchased
     with market discount) and reduced by the annual amortization of bond
     premium, if any, on Bonds held by the Trust.
     
        (iv)   If the Trustee disposes of a Trust asset (whether by sale,
     payment  on  maturity,  redemption or otherwise)  gain  or  loss  is
     recognized  to the Unitholder and the amount thereof is measured  by
     comparing the Unitholder's aliquot share of the total proceeds  from
     the  transaction with his basis for his fractional interest  in  the
     asset  disposed  of.  Such basis is ascertained by apportioning  the
     tax  basis for his Units among each of the Trust assets (as  of  the
     date  on  which his Units were acquired) ratably according to  their
     values  as  of  the  valuation date nearest the  date  on  which  he
     purchased such Units.  A Unitholder's basis in his Units and of  his
     fractional  interest  in each Trust asset must  be  reduced  by  the
     amount  of  his aliquot share of interest received by the Trust,  if
     any,  on  Bonds delivered after the Unitholder's settlement date  to
     the extent that such interest accrued on the Bonds during the period
     from  the  Unitholder's settlement date to the date such  Bonds  are
     delivered  to  the Trust, must be reduced by the annual amortization
     of  bond  premium, if any, on Bonds held by the Trust  and  must  be
     increased  by  the Unitholder's share of the accrued original  issue
     discount  (and market discount, if the Unitholder elects to  include
     market  discount in income as it accrues) with respect to each  Bond
     which,  at the time the Bond was issued, had original issue discount
     (or which was purchased with market discount).
     
          (v)    In  the  case of any Bond held by the  Trust  where  the
     "stated  redemption  price at maturity" exceeds the  "issue  price",
     such  excess shall be original issue discount.  With respect to each
     Unitholder,  upon  the  purchase of  his  Units  subsequent  to  the
     original issuance of Bonds held by the Trust, Section 1272(a)(7)  of
     the Code provides for a reduction in the accrued "daily portion"  of
     such  original issue discount upon the purchase of a Bond subsequent
     to  the Bond's original issue, under certain circumstances.  In  the
     case  of  any  Bond  held  by the Trust the  interest  on  which  is
     excludable  from  gross income under Section 103 of  the  Code,  any
     original issue discount which accrues with respect thereto  will  be
     treated  as  interest which is excludable from  gross  income  under
     Section 103 of the Code.
     
         (vi)   We have examined the Municipal Bond Unit Investment Trust
     Insurance Policies, if any, issued to certain of the Trusts  on  the
     Date  of  Deposit by AMBAC Indemnity Corporation, Financial Guaranty
     Insurance  Corporation or a combination thereof.  Each such  policy,
     or  a  combination of such policies, insures all bonds held  by  the
     Trustee  for  that particular Trust (other than bonds  described  in
     paragraph  (vii)) against default in the prompt payment of principal
     and  interest.   In  our opinion, any amount paid  under  each  said
     policy, or a combination of said policies, which represents maturing
     interest  on  defaulted  obligations held by  the  Trustee  will  be
     excludable from Federal gross income if, and to the same extent  as,
     such interest would have been so excludable if paid in normal course
     by  the  issuer  provided  that,  at  the  time  such  policies  are
     purchased,  the  amounts  paid  for such  policies  are  reasonable,
     customary  and consistent with the reasonable expectation  that  the
     issuer  of the bonds, rather than the insurer, will pay debt service
     on  the  bonds.   Paragraph  (ii) of  this  opinion  is  accordingly
     applicable to insurance proceeds representing maturing interest.
     
        (vii)    Certain bonds in the portfolios of certain of the Trusts
     have  been  insured by the issuers thereof against  default  in  the
     prompt  payment  of  principal  and interest.   Insurance  has  been
     obtained for such bonds, or, in the case of a commitment, the  bonds
     will  be  ultimately insured under the terms of  such  an  insurance
     policy,  which  are  designated  as  issuer  insured  bonds  on  the
     portfolio pages of the respective Trusts in the Prospectus  for  the
     Fund, by the issuer of such bonds.  Insurance obtained by the issuer
     is  effective so long as such bonds remain outstanding.  For each of
     these  bonds,  we  have  been advised that the  aggregate  principal
     amount of such bonds listed on the portfolio page for the respective
     Trust  was  acquired by the applicable Trust and  are  part  of  the
     series of such bonds listed on the portfolio page for the respective
     Trust in the aggregate principal amount listed on the portfolio page
     for  the respective Trust.  Based upon the assumption that the bonds
     acquired  by the applicable Trust are part of the series covered  by
     an  insurance  policy  or,  in the case of  a  commitment,  will  be
     ultimately  insured under the terms of such an insurance policy,  it
     is  our  opinion  that any amounts received by the applicable  Trust
     representing maturing interest on such bonds will be excludable from
     Federal  gross  income if, and to the same extent as, such  interest
     would have been so excludable if paid in normal course by the Issuer
     provided that, at the time such policies are purchased, the  amounts
     paid for such policies are reasonable, customary and consistent with
     the reasonable expectation that the issuer of the bonds, rather than
     the insurer, will pay debt service on the bonds.  Paragraph (ii)  of
     this opinion is accordingly applicable to such payment.
     
     Sections  1288 and 1272 of the Code provide a complex set  of  rules
governing  the  accrual of original issue discount.  These rules  provide
that  original issue discount accrues either on the basis of  a  constant
compound interest rate or ratably over the term of the Bond, depending on
the  date the Bond was issued.  In addition, special rules apply  if  the
purchase price of a Bond exceeds the original issue price plus the amount
of original issue discount which would have previously accured based upon
its  issue price (its "adjusted issue price").  The application of  these
rules  will  also vary depending on the value of the bond on the  date  a
Unitholder acquires his Units, and the price the Unitholder pays for  his
Units.
     
     Because  the  Trusts  do  not include any "private  activity"  bonds
within  the  meaning  of  Section 141 of the  Code  issued  on  or  after
August 8, 1986, none of the Trust Funds' interest income shall be treated
as  an item of tax preference when computing the alternative minimum tax.
In   the  case  of  corporations,  for  taxable  years  beginning   after
December  31,  1986, the alternative minimum tax and  the  Superfund  Tax
depend upon the corporation's alternative minimum taxable income ("AMTI")
which is the corporations' taxable income with certain adjustments.
     
     Pursuant  to Section 56(c) of the Code, one of the adjustment  items
used in computing AMTI and the Superfund Tax of a corporation (other than
an  S  Corporation, Regulated Investment Company, Real Estate  Investment
Trust  or  REMIC) for taxable years beginning after 1989,  is  an  amount
equal  to  75%  of  the  excess of such corporation's  "adjusted  current
earnings"  over an amount equal to its AMTI (before such adjustment  item
and the alternative tax net operating loss deduction).  "Adjusted current
earnings"  includes all tax-exempt interest, including  interest  on  all
Bonds  in  the  Trust,  and tax-exempt original  issue  discount.   Under
current  Code provisions, the Superfund Tax does not apply to  tax  years
beginning on or after January 1, 1996.  However, the Superfund Tax  could
be extended retroactively.
     
     Effective  for  tax  returns  filed after  December  31,  1987,  all
taxpayers  are required to disclose to the Internal Revenue  Service  the
amount of tax-exempt interest earned during the year.
     
     Section  265  of the Code provides for a reduction in  each  taxable
year  of 100 percent of the otherwise deductible interest on indebtedness
incurred  or  continued  by  financial  institutions,  to  which   either
Section  585  or  Section 593 of the Code applies, to purchase  or  carry
obligations acquired after August 7, 1986 (with certain exceptions),  the
interest  on  which is exempt from Federal income taxes for such  taxable
year.   Under  rules  prescribed by Section 265, the amount  of  interest
otherwise  deductible by such financial institutions in any taxable  year
which  is  deemed  to be attributable to tax-exempt obligations  acquired
after August 7, 1986, will be the amount that bears the same ratio to the
interest  deduction  otherwise allowable (determined  without  regard  to
Section  265)  to  the taxpayer for the taxable year  as  the  taxpayer's
average adjusted basis (within the meaning of Section 1016) of tax-exempt
obligations acquired after August 7, 1986, bears to such average adjusted
basis  for  all assets of the taxpayer, unless such financial institution
can  otherwise  establish, under regulations, to  be  prescribed  by  the
Secretary  of  the  Treasury,  the amount  of  interest  on  indebtedness
incurred or continued to purchase or carry such obligations.  On December
7,  1995 the U.S. Treasury Department released proposed legislation that,
if adopted, would generally extend the financial institution rules to all
corporations,  effective  for obligations  acquired  after  the  date  of
announcement.
     
     We  also call attention to the fact that, under Section 265  of  the
Code, interest on indebtedness incurred or continued to purchase or carry
Units  is  not deductible for Federal income tax purposes.   Under  rules
used  by the Internal Revenue Service for determining when borrowed funds
are  considered used for the purpose of purchasing or carrying particular
assets,  the purchase of Units may be considered to have been  made  with
borrowed  funds even though the borrowed funds are not directly traceable
to the purchase of Units.  However, these rules generally do not apply to
interest  paid  on indebtedness incurred for expenditures of  a  personal
nature  such  as  a mortgage incurred to purchase or improve  a  personal
residence.
     
     "The  Revenue  Reconciliation Act of 1993" (the "Tax Act")  subjects
tax-exempt  bonds to the market discount rules of the Code effective  for
bonds purchased after April 30, 1993.  In general, market discount is the
amount  (if any) by which the stated redemption price at maturity exceeds
an  investor's purchase price (except to the extent that such difference,
if  any,  is  attributable to original issue discount  not  yet  accrued)
subject to a statutory de minimis rule.  Market discount can arise  based
on  the  price a Trust pays for Bonds or the price a Unitholder pays  for
his  or  her  Units.  Under the Tax Act, accretion of market discount  is
taxable  as  ordinary  income; under prior law, the  accretion  had  been
treated  as  capital gain.  Market discount that accretes while  a  Trust
holds  a  Bond would be recognized as ordinary income by the  Unitholders
when  principal  payments  are received on the  Bond,  upon  sale  or  at
redemption  (including early redemption), or upon the sale of  redemption
of  his  or  her  Units,  unless a Unitholder elects  to  include  market
discount in taxable income as it accrues.
                                    
                                    Very truly yours,
                                    
                                    
                                    
                                    Chapman and Cutler
MJK/cjw

                                                           Exhibit 3.3

                                 Kroll & Tract
                              520 Madison Avenue
                              New York, NY  10022
                                       
                                August 21, 1996
                                       
                                       
                                       
Insured Municipals Income Trust
  204th Insured Multi-Series
The Bank of New York,
  As Trustee
101 Barclay Street, 17 West
New York, New York 10286

Dear Sirs:
     
     We have acted as special counsel for the Insured Municipals Income Trust,
204th  Insured  Multi-Series  (the "Fund") consisting  of  Insured  Municipals
Income  Trust  Series  377 and Pennsylvania Insured Municipals  Income  Trust,
Series  222, (individually the "Trust" and in the aggregate the "Trusts")  for
the  purposes of determining the applicability of certain New York taxes under
the circumstances hereinafter described.
     
     The  Fund  is  created pursuant to a Trust Agreement  (the  "Indenture"),
dated  as  of today (the "Date of Deposit") among Van Kampen American  Capital
Distributors, Inc. (the "Depositor"), American Portfolio Evaluation  Services,
a  division  of  Van  Kampen American Capital Investment  Advisory  Corp.,  as
Evaluator, and The Bank of New York as Trustee (the "Trustee").  As  described
in the prospectus relating to the Fund dated today to be filed as an amendment
to  a registration statement previously filed with the Securities and Exchange
Commission  (file  number  333-08677) under the Securities  Act  of  1933,  as
amended (the "Prospectus" and the "Registration Statement"), the objectives of
the  Fund  are  the generation of income exempt from Federal taxation  and  as
regards  each  of  the  "State" Trusts exempt from  income  tax  and  personal
property  tax of the State denominated in the name of that "State"  Trust,  if
any,  to  the  extent  indicated in the Prospectus.  No opinion  is  expressed
herein with regard to the Federal or State tax aspects of the bonds, the Fund,
Trusts  (other  than New York), units of the Trusts (the "Units")  other  than
New York, or any interest, gains or losses in respect thereof.
     
     As  more  fully  set  forth in the Indenture and in the  Prospectus,  the
activities of the Trustee will include the following:
     
     On  the Date of Deposit, the Depositor will deposit with the Trustee with
respect  to each of the Trusts, the total principal amount of interest bearing
obligations  and/or  contracts  for  the purchase  thereof  together  with  an
irrevocable letter of credit in the amount required for the purchase price and
accrued  interest, if any, and an insurance policy purchased by the  Depositor
evidencing  the  insurance guaranteeing the timely payment  of  principal  and
interest of tile obligations comprising the corpus of such trusts oilier  than
those  obligations the timely payment of principal and interest of  which  are
guaranteed by an insurance policy purchased by the issuer thereof or  a  prior
owner, which may be the Depositor prior to the Date of Deposit, as more  fully
set forth in the Prospectus with respect to each Trust.
     
     We  understand with respect to the obligations described in the preceding
paragraph  that  all  insurance, whether purchased by the Depositor,  a  prior
owner  or the issuer, provides, or will provide, that the amount paid  by  the
insurer  in  respect of any bond may not exceed the amount  of  principal  and
interest due on the bond and such payment will in no event relieve the  issuer
from its continuing obligation to pay such defaulted principal and interest in
accordance with the terms of the obligation.
     
     The  Trustee will not participate in the selection of the obligations  to
be  deposited in the Fund, and, upon the receipt thereof, will deliver to  the
Depositor  a  registered certificate for the number of Units representing  the
entire capital of each of the Trusts as more fully set forth in the Prospectus
and  the  Registration  Statement.   The  Units,  which  are  represented   by
certificates ("Certificates"), will be offered to the public by the Prospectus
upon the effectiveness of the Registration Statement.
     
     The  duties of the Trustee, which are ministerial in nature, will consist
primarily of crediting the appropriate accounts with interest received by each
of  the Trusts and with the proceeds from the disposition of obligations  held
in  the Trusts and the distribution of such interest and proceeds to the  Unit
holders  of  that  Trust.   The  Trustee will also  maintain  records  of  the
registered holders of Certificates representing an interest in each Trust  and
administer the redemption of Units by such Certificate holders and may perform
certain  administrative  functions with respect  to  an  automatic  investment
option.
     
     Generally, obligations held in the Fund may be removed therefrom  by  the
Trustee  only upon redemption prior to their stated maturity, at the direction
of  the  Depositor in the event of an advance refunding or upon the occurrence
of  certain other specified events which adversely affect the sound investment
character of the Fund, such as default by the issuer in payment of interest or
principal  on  the  obligation and no provision for payment is  made  therefor
either  pursuant to insurance or otherwise and the Depositor fails to instruct
the  Trustee,  within  thirty  (30)  days after  notification,  to  hold  such
obligation.
     
     Prior  to the termination of the Fund, the Trustee is empowered  to  sell
Bonds,  from  a  list  furnished by the Evaluator, only  for  the  purpose  of
redeeming Units tendered to it and of paying expenses for which funds are  not
available.  The Trustee does not have the power to vary the investment of  any
Unit  holder in the Fund, and under no circumstances may the proceeds of  sale
of  any obligations held by the Fund be used to purchase new obligations to be
held therein.
     
     Article  9-A of the New York Tax Law imposes a franchise tax on  business
corporations,  and, for purposes of that Article, Section 208(l)  defines  the
term "corporation" to include, among other things, "any business conducted  by
a   trustee  or  trustees  wherein  interest  or  ownership  is  evidenced  by
certificate or other written instrument."
     
     The Regulations promulgated under Section 208 provide as follows:
          
          A  business  conducted by a trustee or trustees  in  which
          interest or ownership is evidenced by certificate or other
          written  instrument includes, but is not  limited  to,  an
          association commonly referred to as a "business trust"  or
          "Massachusetts trust".  In determining whether  a  trustee
          or  trustees  are conducting a business, the form  of  the
          agreement is of significance but is not controlling.   The
          actual  activities of the trustee or trustees,  not  their
          purposes and powers, will be regarded as decisive  factors
          in  determining whether a trust is subject  to  tax  under
          Article  9-A.   The  mere  investment  of  funds  and  the
          collection    of   income   therefrom,   with   incidental
          replacement of securities and reinvestment of funds,  does
          not constitute the conduct of a business in the case of  a
          business  conducted by a trustee or trustees. 20 NYCRR  1-
          2.3(b)(2) (July 11, 1990).
     
     New  York  cases  dealing with the question of whether a  trust  will  be
subject to the franchise tax have also delineated the general rule that  where
a  trustee  merely  invests  funds and collects  and  distributes  the  income
therefrom,  the  trust is not engaged in business and is not  subject  to  the
franchise  tax.   Burrell v. Lynch, 274 A.D. 347, 84 N.Y.S.2d 171  (3rd  Dept.
1948), order resettled, 274 A.D. 1083, 85 N.Y.S.2d 705 (3rd Dept. 1949).
     
     In  an opinion of the Attorney General of the State of New York, 47  N.Y.
Atty. Gen. Rep. 213 (Nov. 24, 1942), it was held that where the trustee of  an
unincorporated  investment  trust was without authority  to  reinvest  amounts
received  upon the sales of securities and could dispose of securities  making
up  the  trust  only  upon the happening of certain specified  events  or  the
existence  of certain specified conditions, the trust was not subject  to  the
franchise tax.
     
     In   the  instant  situation,  the  Trustee  is  not  empowered  to  sell
obligations  contained  in the corpus of the Fund and  reinvest  the  proceeds
therefrom.   Further,  the  power  to sell  such  obligations  is  limited  to
circumstances in which the creditworthiness or soundness of the obligation  is
in question or in which cash is needed to pay redeeming Unit holders or to pay
expenses, or where the Fund is liquidated pursuant to the termination  of  the
Indenture.   Only  in  circumstances in which  the  issuer  of  an  obligation
attempts  to  refinance it can the Trustee exchange an obligation  for  a  new
security.  In substance, the Trustee will merely collect and distribute income
and will not reinvest any income or proceeds, and the Trustee has no power  to
vary the investment of any Unit holder in the Fund.
     
     Under  Subpart  E  of Part 1, Subchapter J of Chapter I of  the  Internal
Revenue Code of 1986, as amended (the "Code"), the grantor of a trust will  be
deemed  to be the owner of the trust under certain circumstances and therefore
taxable  on  his  proportionate interest in the income  thereof.   Where  this
Federal  tax rule applies, the income attributed to the grantor will  also  be
income  to him for New York income tax purposes.  See TSB-M78(9)(c), New  York
Department of Taxation and Finance, June 23, 1978.
     
     Article 22 (Personal Income Tax) of the New York Tax Law imposes a tax on
a  New  York  State resident individual's State adjusted gross  income.   Such
amount is defined by Section 612 as his Federal adjusted gross income, with an
addition  for  interest  income on the obligations of  a  State  or  political
subdivision  of  a  state other than New York, if excluded  from  his  federal
adjusted  gross  income.   Such amount is defined by  Section  T46112  of  the
Administrative  Code  of  the City of New York as Ins Federal  adjusted  gross
income, with an addition for interest income on the obligations of a state  or
political  subdivision of a state other than New York, if  excluded  from  his
federal  adjusted gross income. 48 U.S.C.  Section 745 exempts interest  on  a
bond  issued  by  the  Government of Puerto Rico or  a  political  subdivision
thereof  from  tax  of the United States, of any State,  and  of  any  state's
county,  municipality,  or municipal subdivision thereof.  48  U.S.C.  Section
1423a  exempts interest on a bond issued by the Government of Guam or  by  its
authority  from  taxation  by  the  United  States,  any  state  or  political
subdivision.   The New York Trust holds only obligations issued  by  New  York
State  or a political subdivision thereof or by the Government of Puerto  Rico
or  a  political subdivision thereof, or by the Government of Guam or  by  its
authority.
     
     By  letter,  dated  today, Messrs. Chapman and Cutler,  counsel  for  the
Depositor,  rendered their opinion that each Unit holder of a  Trust  will  be
considered  as  owning a share of each asset of that Trust in  the  proportion
that  the  number  of Units held by such holder bears to the total  number  of
Units  outstanding and the income of a Trust will be treated as the income  of
each  Unit  holder of that Trust in said proportion pursuant to Subpart  E  of
Part 1, Subchapter J of Chapter I of the Code.
     
     Based  on the foregoing and of the opinion of Messrs. Chapman and Cutler,
co-counsel for the Depositor, dated today, upon which we specifically rely, we
are  of  the  opinion that under existing laws, rulings, and  court  decisions
interpreting the laws of the State and City of New York:

      1.   Each of the Trusts will not constitute an association taxable as  a
corporation under New York law, and, accordingly, will not be subject  to  tax
on  its  income  under the New York State franchise tax or the New  York  City
general corporation tax.

      2.    The income of each of the Trusts will be treated as the income  of
the Unit holders under the income tax laws of the State and City of New York.

      3.   Resident individuals of New York State and City will not be subject
to  the  State  or  City  personal income taxes on interest  income  on  their
proportionate shares of interest income earned by a Trust on any obligation of
New  York  State  or a political subdivision thereof or of the  Government  of
Puerto Rico or a political subdivision thereof or of the Government of Guam or
by  its authority, to the extent such income is excludable from Federal  gross
income under Code Section 103.

      4.    Any  amounts  paid under the insurance policies purchased  by  the
Depositor  and  deposited  with the Trustee, as more  fully  described  above,
representing  maturing interest on defaulted obligations held by  the  Trustee
will not be subject to New York State or City income taxes if, and to the same
extent as, such amounts would have been excludable from New York State or City
income  taxes  if  paid  by  the  issuer.  Paragraph  3  of  this  opinion  is
accordingly applicable to such policy proceeds representing maturing interest.

      5.    Any amounts paid under an insurance policy purchased by the issuer
of an obligation or a prior owner, as more fully described above, representing
maturing  interest on such defaulting obligation held by the Trustee will  not
be  subject to New York State or City income taxes if, and to the same  extent
as, such amounts would have been excludable from New York State or City income
taxes  if  paid  by  the issuer.  Paragraph 3 of this opinion  is  accordingly
applicable to such policy proceeds representing maturing interest.

      6.   Resident individuals of New York State and City who hold Units will
recognize  gain or loss, if any, under the State or City personal  income  tax
law  if the Trustee disposes of a Fund asset.  The amount of such gain or loss
is measured by comparing the Unit holder's aliquot share of the total proceeds
from  the transaction with his basis for his fractional interest in the  asset
disposed of.  Such basis is ascertained by apportioning the tax basis for  his
Units among each of the Trust's assets (as of the date on which is Units  were
acquired)  ratably according to their values as of the valuation date  nearest
the date on which he purchased such Units.  A Unit holder's basis in his Units
and  of  his fractional interest in the Trust's assets must be reduced by  the
amount  of  his aliquot share of interest received by the Trust,  if  any,  on
bonds  delivered  after the settlement date to the extent that  such  interest
accrued on the Bonds during the period from the Unit holder's settlement  date
to  the  date such Bonds are delivered to that Trust and must be adjusted  for
amortization of bond premium or accretion of original issue discount, if  any,
on tax-exempt obligations held by the Trust.

      7.   Resident individuals of New York State and City who hold Units will
recognize  gain or loss, if any, under the State or City personal  income  tax
law  if  the  Unit holder sells or redeems any Units.  Such gain  or  loss  is
increased  by  comparing  the proceeds of such redemption  or  sale  with  the
adjusted  basis of the Units redeemed or sold.  Before adjustment, such  basis
would  normally be cost if the Unit holder had acquired his Units by purchase,
plus  his aliquot share of advances by the Trustee to the Fund to pay interest
on  Bonds delivered after the Unit holder's settlement date to the extent that
such  interest accrued on the Bonds during the period from the settlement date
to  the date such Bonds are delivered to the Fund, but only to the extent that
such advances are to be repaid to the Trustee out of interest received by  the
Fund with respect to such Bonds.

     8.   Unit holders who are not residents of New York State are not subject
to  the  personal income tax law thereof with respect to any interest or  gain
derived  from  a Trust or any gain from the sale or other disposition  of  the
Units,  except  to  the  extent that such interest or gain  is  from  property
employed in a business, trade, profession or occupation carried on in New York
state.
     
     In  addition, we are of the opinion that no New York State stock transfer
tax  will be payable in respect of any transfer of the Certificates by  reason
of the exemption contained in paragraph (a) of Subdivision 8 of Section 270 of
the New York Tax Law.
     
     We  hereby  consent to the filing of this opinion as an  exhibit  to  the
Registration  Statement relating to the Units and to the use of our  name  and
the reference to our firm in the Registration Statement and in the Prospectus.
                                    
                                    Very truly yours,
                                    
                                    
                                    Kroll & Tract


MNS:hbm


                                                        Exhibit 3.4


                        Saul, Ewing, Remick & Saul
                         3800 Centre Square West
                         Philadelphia, PA  19102
                                    
                                    
                             August 21, 1996
                                    
                                    
                                    
Insured Municipals Income Trust
  204th Insured Multi-Series
Pennsylvania Insured Municipals
  Income Trust, Series 222
c/o Chapman & Cutler
111 W. Monroe Street
Chicago, Illinois  60603

Attention:   Mark J. Kneedy, Esquire
     
     
     Re:Insured Municipals Income Trust, 204th Insured Multi-Series
        Pennsylvania Insured Municipals Income Trust, Series 221
     
     
     
Gentlemen:
     
     We  are  acting as special counsel with respect to Pennsylvania  tax
matters  for  the Insured Municipals Income Trust, 204th  Insured  Multi-
Series,  Pennsylvania Insured Municipals Income Trust,  Series  222  (the
"Fund")  in connection with the issuance of Units of fractional undivided
interests in the Fund, under a Trust Indenture and Agreement dated August
21,  1996  between Van Kampen American Capital Distributors,  Inc.  ("Van
Kampen")  as  Depositor, American Portfolio Advisory  Service,  Inc.,  as
Evaluator,  and  The  Bank  of New York through  its  Wall  Street  Trust
division, as Trustee.  It is our understanding that the Fund consists  of
a  portfolio  composed  of  interest-bearing obligations  issued  by  the
Commonwealth  of Pennsylvania or by municipalities and other governmental
authorities within the Commonwealth of Pennsylvania (the "Bonds").
     
     We have not examined any preliminary or final official statements of
issuers  of  the  Bonds,  nor have we examined  any  legal  opinions,  or
summaries of such opinions, relating to the validity of the Bonds in  the
Fund,  the  exemption of interest thereon from federal  income  tax,  the
exemption  of the Bonds from personal property taxes in Pennsylvania,  or
the  exemption of the interest on and any gain from the sale of the Bonds
from  the Pennsylvania personal income tax, given or to be given by  bond
counsel  to  the issuer at the time such Bonds are issued.   Further,  we
have  made no review of the proceedings relating to the issuance  of  the
Bonds or of the basis for such opinions.  Our opinion expressed below  is
based  in  part  on  the  assurance of Van Kampen that  the  Bonds  being
deposited  in  the  Fund  have been issued only by  the  Commonwealth  of
Pennsylvania  or by or on behalf of municipalities or other  governmental
agencies within the Commonwealth of Pennsylvania.
     
     We have examined certified copies, or copies otherwise identified to
our satisfaction, of such other documents as we have deemed necessary  or
appropriate  for  the purpose of rendering this opinion, including  those
related  to  previous transactions in which Van Kampen was the  Depositor
which  we have been assured by Van Kampen are substantially the  same  as
those relating to the Fund.
     
     Based upon the foregoing, we are of the opinion that:
     
          (1)    Units evidencing fractional undivided interests  in  the
     Fund,  to  the  extent  represented by  obligations  issued  by  the
     Commonwealth  of  Pennsylvania,  any public  authority,  commission,
     board  or  other agency created by the Commonwealth of Pennsylvania,
     any political subdivision of the Commonwealth of Pennsylvania or any
     public authority created by any such political subdivision, are  not
     taxable under any of the personal property taxes presently in effect
     in Pennsylvania;
     
         (2)   Distributions of interest income to Unitholders that would
     not  be taxable if received directly by a Pennsylvania resident  are
     not subject to personal income tax under the Pennsylvania Tax Reform
     Code  of  1971; nor will such interest be taxable under Philadelphia
     School  District  Investment  Income  Tax  imposed  on  Philadelphia
     resident individuals;
     
           (3)    A  Unitholder  may  have  a  taxable  event  under  the
     Pennsylvania state and local income tax referred to in the preceding
     paragraph upon the redemption or sale of his Units but not upon  the
     disposition  of any of the Bonds in the Fund to which  the  holder's
     Units relate;
     
          (4)    Units are subject to Pennsylvania inheritance and estate
     taxes;
     
          (5)    A  Unitholder which is a corporation may have a  taxable
     event  under  the  Pennsylvania Corporate Net Income  Tax  upon  the
     redemption  or  sale of its Units.  Interest income  distributed  to
     Unitholders  which are corporations is not subject  to  Pennsylvania
     Corporate  Net  Income  Tax  or  Mutual  Thrift  Institutions   Tax.
     However, banks, title insurance companies and trust companies may be
     required to take the value of Units into account in determining  the
     taxable value of their shares subject to Shares Tax;
     
         (6)   Gains derived by the Fund from the sale, exchange or other
     disposition  of  bonds  may be subject to Pennsylvania  personal  or
     corporate  income taxes.  Those gains which are distributed  by  the
     Fund  to  the  Unitholders who are individuals  may  be  subject  to
     Pennsylvania  Personal  Income  Tax.   For  Unitholders  which   are
     corporations, the distributed gains may be subject to Corporate  Net
     Income  Tax or Mutual Thrift Institutions Tax.  Gains which are  not
     distributed  by the Fund may nevertheless be taxable to  Unitholders
     if  derived by the Fund from the sale, exchange or other disposition
     of  Bonds issued on or after February 1, 1994.  Gains which are  not
     distributed  by  the Fund will remain nontaxable to  Unitholders  if
     derived by the Fund from the sale, exchange or other disposition  of
     Bonds issued prior to February 1, 1994;
     
          (7)   Any proceeds paid under insurance policies issued to  the
     Trustee or obtained by issuers or the underwriters of the bonds, the
     Sponsor  or others which represent interest on defaulted obligations
     held  by  the  Trustee  will be excludable from  Pennsylvania  gross
     income if, and to the same extent as, such interest would have  been
     so  excludable  if paid in the normal course by the  issuer  of  the
     defaulted obligations; and
     
           (8)     The  Fund  is  not  taxable  as  a  corporation  under
     Pennsylvania tax laws applicable to corporations.
     
     We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement (SEC No. 333-08677) relating to the Units referred
to  above and to the use of our name and to the reference to our firm  in
the said Registration Statement and in the related Prospectus.
                                    Very truly yours,
                                    
                                    Saul, Ewing, Remick & Saul
                                    
GTM/tmr


                                                              Exhibit 4.1


Interactive Data
14 West Street
New York, NY  10005


August 20, 1996


Van Kampen American Capital Distributors, Inc.
One Parkview Plaza
Oakbrook Terrace, IL 60181
     
     
     Re: Insured Municipals Income Trust, 204th Insured Multi-Series
     (A Unit Investment Trust) Registered Under the Securities Act of
     1933
                                            File No. 333-08677
     
Gentlemen:
     
     We  have  examined the Registration Statement for the above  captioned
Fund, copy of which is attached hereto.
     
     We  hereby consent to the reference in the Prospectus and Registration
Statement for the above captioned Fund to Interactive Data Services,  Inc.,
as  the  Evaluator, and to the use of the Obligations prepared by us  which
are referred to in such Prospectus and Statement.
     
     You  are  authorized to file copies of this letter with the Securities
and Exchange Commission.

Very truly yours,


James Perry
Vice President


                                                      Exhibit 4.2


Standard & Poor's Ratings Services,
A division of The McGraw-Hill Companies, Inc.
25 Broadway
New York, New York  10004-1064


Van Kampen American Capital
One Parkview Plaza
Oakbrook Terrace, Illinois  60181

Re:  Insured Municipals Income Trust, 204th Insured Multi-Series - consisting
of:
     Insured Municipals Income Trust, Series 377 and
     Pennsylvania Insured Municipals Income Trust, Series 222
     
     Pursuant  to your request for a Standard & Poor's rating on the units  of
the  above-captioned trust, SEC #333-08677, we have reviewed  the  information
presented to us and have assigned a 'AAA' rating to the units of the trust and
a  'AAA'  rating to the securities contained in the trust for as long as  they
remain in the trust.  The ratings are direct reflections, of the portfolio  of
the  trust,  which  will  be  composed solely of securities  covered  by  bond
insurance policies that insure against default in the payment of principal and
interest  on the securities so long as they remain in the trust.   Since  such
policies  have been issued by one or more insurance companies which have  been
assigned a 'AAA' claims paying ability rating by S&P, S&P has assigned a 'AAA'
rating to the units of the trust and to the securities contained in the  trust
for as long as they remain in the trust.
     
     Standard  &  Poor's will maintain surveillance on the "AAA" Rating  Until
September  21,  1997. On this date, the rating will be automatically withdrawn
by Standard & Poor's unless a post effective letter is requested by the trust.
     
     You  have permission to use the name of Standard & Poor's Corporation and
the   above-assigned  ratings  in  connection  with  your   dissemination   of
information relating to these units, provided that it is understood  that  the
ratings are not "market" ratings nor recommendations to buy, hold, or sell the
units  of  the  trust or the securities contained in the trust.   Further,  it
should  be  understood the rating on the units does not take into account  the
extent  to  which  fund expenses or portfolio asset sales for  less  than  the
fund's  purchase price will reduce payment to the unit holders of the interest
and  principal required to be paid on the portfolio assets.  S&P reserves  the
right  to  advise its own clients, subscribers, and the public of the ratings.
S&P  relies on the sponsor and its counsel, accountants, and other experts for
the  accuracy and completeness of the information submitted in connection with
the  ratings.  S&P does not independently verify the truth or accuracy of  any
such information.
     
     This  letter evidences our consent to the use of the name of  Standard  &
Poor's Corporation in connection with the rating assigned to the units in  the
registration  statement  or prospectus relating to the  units  or  the  trust.
However,  this letter should not be construed as a consent by us,  within  the
meaning of Section 7 of the Securities Act of 1933, to the use of the name  of
Standard & Poor's Corporation in connection with the ratings assigned  to  the
securities contained in the trust.  You are hereby authorized to file  a  copy
of this letter with the Securities and Exchange Commission.
     
     Please  be  certain to send us three copies of your final  prospectus  as
soon  as it becomes available.  Should we not receive them within a reasonable
time  after the closing or should they not conform to the representations made
to us, we reserve the right to withdraw the rating.
     
     We  are pleased to have had the opportunity to be of service to you.   If
we can be of further help, please do not hesitate to call upon us.

                                    Sincerely,
                                    
                                    Sanford B. Bragg
                                    Managing Director



                                                          Exhibit 4.3
                                    
                                    
            Independent Certified Public Accountants' Consent
     
     We have issued our report dated August 21, 1996 on the statements of
condition and related bond portfolios of Insured Municipals Income Trust,
204th Insured Multi-Series (IM-IT and Pennsylvania IM-IT Trusts) as of
August 21, 1996 contained in the Registration Statement on Form S-6 and
Prospectus.  We consent to the use of our report in the Registration
Statement and Prospectus and to the use of our name as it appears under
the  caption  "Trust Administration-Independent Certified  Public
Accountants" in Part II of the Prospectus.



                                    Grant Thornton LLP

Chicago, Illinois
August 21, 1996

WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
This report reflects (time period) taken from 487 on (date) it is unaudited
</LEGEND>
<SERIES>
<NUMBER> 377
<NAME> IMIT
       
<CAPTION>
<S>                         <C>                  
<PERIOD-TYPE>               YEAR                 
<FISCAL-YEAR-END>               JUL-31-1997     
<PERIOD-START>                  AUG-21-1996     
<PERIOD-END>                    AUG-21-1996     
<INVESTMENTS-AT-COST>               8662702     
<INVESTMENTS-AT-VALUE>              8662702     
<RECEIVABLES>                         84551     
<ASSETS-OTHER>                            0     
<OTHER-ITEMS-ASSETS>                      0     
<TOTAL-ASSETS>                      8747253     
<PAYABLE-FOR-SECURITIES>                  0     
<SENIOR-LONG-TERM-DEBT>                   0     
<OTHER-ITEMS-LIABILITIES>             84551     
<TOTAL-LIABILITIES>                   84551     
<SENIOR-EQUITY>                           0     
<PAID-IN-CAPITAL-COMMON>            8662702     
<SHARES-COMMON-STOCK>                  9109     
<SHARES-COMMON-PRIOR>                     0     
<ACCUMULATED-NII-CURRENT>                 0     
<OVERDISTRIBUTION-NII>                    0     
<ACCUMULATED-NET-GAINS>                   0     
<OVERDISTRIBUTION-GAINS>                  0     
<ACCUM-APPREC-OR-DEPREC>                  0     
<NET-ASSETS>                        8662702     
<DIVIDEND-INCOME>                         0     
<INTEREST-INCOME>                         0     
<OTHER-INCOME>                            0     
<EXPENSES-NET>                            0     
<NET-INVESTMENT-INCOME>                   0     
<REALIZED-GAINS-CURRENT>                  0     
<APPREC-INCREASE-CURRENT>                 0     
<NET-CHANGE-FROM-OPS>                     0     
<EQUALIZATION>                            0     
<DISTRIBUTIONS-OF-INCOME>                 0     
<DISTRIBUTIONS-OF-GAINS>                  0     
<DISTRIBUTIONS-OTHER>                     0     
<NUMBER-OF-SHARES-SOLD>                   0     
<NUMBER-OF-SHARES-REDEEMED>               0     
<SHARES-REINVESTED>                       0     
<NET-CHANGE-IN-ASSETS>                    0     
<ACCUMULATED-NII-PRIOR>                   0     
<ACCUMULATED-GAINS-PRIOR>                 0     
<OVERDISTRIB-NII-PRIOR>                   0     
<OVERDIST-NET-GAINS-PRIOR>                0     
<GROSS-ADVISORY-FEES>                     0     
<INTEREST-EXPENSE>                        0     
<GROSS-EXPENSE>                           0     
<AVERAGE-NET-ASSETS>                      0     
<PER-SHARE-NAV-BEGIN>                     0     
<PER-SHARE-NII>                           0     
<PER-SHARE-GAIN-APPREC>                   0     
<PER-SHARE-DIVIDEND>                      0     
<PER-SHARE-DISTRIBUTIONS>                 0     
<RETURNS-OF-CAPITAL>                      0     
<PER-SHARE-NAV-END>                       0     
<EXPENSE-RATIO>                           0     
<AVG-DEBT-OUTSTANDING>                    0     
<AVG-DEBT-PER-SHARE>                      0     
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
This report reflects (time period) taken from 487 on (date) it is unaudited
</LEGEND>
<SERIES>
<NUMBER> 222
<NAME> IPA
       
<CAPTION>
<S>                         <C>                  
<PERIOD-TYPE>               YEAR                 
<FISCAL-YEAR-END>               JUL-31-1997     
<PERIOD-START>                  AUG-21-1996     
<PERIOD-END>                    AUG-21-1996     
<INVESTMENTS-AT-COST>               2870128     
<INVESTMENTS-AT-VALUE>              2870128     
<RECEIVABLES>                         40724     
<ASSETS-OTHER>                            0     
<OTHER-ITEMS-ASSETS>                      0     
<TOTAL-ASSETS>                      2910852     
<PAYABLE-FOR-SECURITIES>                  0     
<SENIOR-LONG-TERM-DEBT>                   0     
<OTHER-ITEMS-LIABILITIES>             40724     
<TOTAL-LIABILITIES>                   40724     
<SENIOR-EQUITY>                           0     
<PAID-IN-CAPITAL-COMMON>            2870128     
<SHARES-COMMON-STOCK>                  3018     
<SHARES-COMMON-PRIOR>                     0     
<ACCUMULATED-NII-CURRENT>                 0     
<OVERDISTRIBUTION-NII>                    0     
<ACCUMULATED-NET-GAINS>                   0     
<OVERDISTRIBUTION-GAINS>                  0     
<ACCUM-APPREC-OR-DEPREC>                  0     
<NET-ASSETS>                        2870128     
<DIVIDEND-INCOME>                         0     
<INTEREST-INCOME>                         0     
<OTHER-INCOME>                            0     
<EXPENSES-NET>                            0     
<NET-INVESTMENT-INCOME>                   0     
<REALIZED-GAINS-CURRENT>                  0     
<APPREC-INCREASE-CURRENT>                 0     
<NET-CHANGE-FROM-OPS>                     0     
<EQUALIZATION>                            0     
<DISTRIBUTIONS-OF-INCOME>                 0     
<DISTRIBUTIONS-OF-GAINS>                  0     
<DISTRIBUTIONS-OTHER>                     0     
<NUMBER-OF-SHARES-SOLD>                   0     
<NUMBER-OF-SHARES-REDEEMED>               0     
<SHARES-REINVESTED>                       0     
<NET-CHANGE-IN-ASSETS>                    0     
<ACCUMULATED-NII-PRIOR>                   0     
<ACCUMULATED-GAINS-PRIOR>                 0     
<OVERDISTRIB-NII-PRIOR>                   0     
<OVERDIST-NET-GAINS-PRIOR>                0     
<GROSS-ADVISORY-FEES>                     0     
<INTEREST-EXPENSE>                        0     
<GROSS-EXPENSE>                           0     
<AVERAGE-NET-ASSETS>                      0     
<PER-SHARE-NAV-BEGIN>                     0     
<PER-SHARE-NII>                           0     
<PER-SHARE-GAIN-APPREC>                   0     
<PER-SHARE-DIVIDEND>                      0     
<PER-SHARE-DISTRIBUTIONS>                 0     
<RETURNS-OF-CAPITAL>                      0     
<PER-SHARE-NAV-END>                       0     
<EXPENSE-RATIO>                           0     
<AVG-DEBT-OUTSTANDING>                    0     
<AVG-DEBT-PER-SHARE>                      0     
        

</TABLE>


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