🇺🇸United States·Seen from outside

I. M. Pei Building (formerly Wilmington Tower)

Wilmington, Delaware

Sources checked November 2026

“An office tower in downtown Wilmington, with floor-to-ceiling glass on its office floors, that now bears Pei's name.”

Year: 1971
Architect: I. M. Pei
Type: Office tower
Access: Office building, to be seen from the street

Completed in 1971 after a project begun in 1963, this office tower on North Market Street in downtown Wilmington, Delaware, is the work of I. M. Pei & Partners. It was known as Wilmington Tower, American Life Insurance Tower and American International Building before taking its present name, I. M. Pei Building.

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History

The Wilmington Tower project occupied Pei's firm from 1963 to 1971, the year it was completed. The building has been called Wilmington Tower, American Life Insurance Tower and American International Building; its official name today is I. M. Pei Building. It was renovated in 2004.