Architect

Skidmore, Owings & Merrill

GC

Morse Diesel International

Completion

1985

Contract Value

1.4m

Program

108-stories, 1450 ft

Building Type

Commercial

Description

The Willis Tower (previously known as Sears Tower) was the tallest building in the world from 1974-1996, and underwent a revitalization in 1985 that included a new atrium structure