Trizec Properties, Inc., previously known as TrizecHahn Corporation, was a real estate investment trust headquartered in Chicago, Illinois.

[1] The name is derived from the initials of the three groups (Tri) that formed Trizec Properties Ltd: Zeckendorf, Eagle Star, and Covent Gardens.

Trizec was founded in 1960 by William Zeckendorf with British associates recapitalize the Place Ville Marie development in Montreal.

[9] By early 2000, 80% of TrizecHahn's revenues was from the United States and the company moved its headquarters to Chicago and sold all holdings it held in Canada, changing its name to Trizec.

[11] In November 2002, after the September 11 attacks, the company wrote down two-thirds of the $70 million investment it made in 1997 to gain control of the Sears Tower.