VAN KAMPEN AMERICAN CAPITAL INSURED INCOME TRUST SER 59, 485BPOS, EX-99.1.1, 2000-11-22

VAN KAMPEN AMERICAN CAPITAL INSURED INCOME TRUST SER 59
485BPOS, EX-99.1.1, 2000-11-22

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               Consent of Independent Certified Public Accountants

         We have issued our report dated September 15, 2000 accompanying the
financial statements of Van Kampen American Capital Insured Income Trust, Series
59 as of July 31, 2000, and for the period then ended, contained in this
Post-Effective Amendment No. 4 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
November 22, 2000