SUPPLEMENT TO THE PROSPECTUS
Insured Municipals Income Trust, Insured Multi-Series 156
Supplement to page 17 of the Prospectus Dated March 17, 1994
Notwithstanding to anything to the contrary in the prospectus, in additiion
to any sales charge reductions referred to under "Unitholder Explanations -
Public Offering - General", anyone who purchases, or commits to purchase
at the first availab1e date, from any one Underwriter or dealer, units of
IM-IT Series 323, IM-IT 73rd Limited Maturity and IM-IT 74th Limited
Maturity which when aggregated equal 1,000 or more units will be entitled
to that reduced sales charge for 1,000 or more units in connection with
the purchase of all such units.
April 26, 1994
