Consent of Independent Certified Public Accountants

         We have issued our report dated June 16, 2000 accompanying the
financial statements of Insured Municipals Income Trust and Investors' Quality
Tax-Exempt Trust, Multi-Series 200 as of April 30, 2000, and for the period then
ended, contained in this Post-Effective Amendment No. 7 to Form S-6.

         We consent to the use of the aforementioned report in the Post-
Effective Amendment and to the use of our name as it appears under the caption
"Auditors".

                                        Grant Thornton LLP

Chicago, Illinois
August 25, 2000



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