MUNICIPAL INVT TR FD INSURED SERIES 190 DEFINED ASSET FDS, 485BPOS, EX-99.C1ACCTCONST, 2000-06-26

MUNICIPAL INVT TR FD INSURED SERIES 190 DEFINED ASSET FDS
485BPOS, EX-99.C1ACCTCONST, 2000-06-26

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                                                                     Exhibit 5.1
                       CONSENT OF INDEPENDENT ACCOUNTANTS

The Sponsors and Trustee of
Municipal Investment Trust Fund--Insured Series--190, Defined Asset Funds

We consent to the use in this Post-Effective Amendment No. 7 to Registration
Stateme nt No. 33-49385 of our opinion dated June 6, 2000 appearing in the
Prospectus, which is part of such Registration Statement, and to the reference
to us under the heading "How The Fund Works--Auditors" in such Prospectus.

DELOITTE & TOUCHE LLP
New York, N.Y.
June 26, 2000