In this October 1971 snapshot, the IDS CENTER tower is topped out, but would still be under construction for several months. Its first tenants would start moving in in early 1972.
Photo from

The fully-completed IDS CENTER extended skyward for 792 feet. Today, the 57-story structure is (reputedly) the tallest building in the Twin Cities, as well as in the North Star State.
Photo from Wikipedia / Jim Winstead, Junior

A circa-1973 CRYSTAL COURT layout. The multi-purpose atrium was comprised of 3 levels; these being the Concourse (or basement), Mall and Skyway floors. The Skyway Level connected with adjacent Dayton's and Donaldson's flagship stores.

CRYSTAL COURT encloses an 8-story space beneath a stunning array of plastic and glass skylights. The highest of these are suspended 121 feet in the air. 
Photo from Wikipedia / Payton Chung