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; one of these being the Dayton Hudson Corporation.
Photo from http://ids-center.com

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

A section of Minneapolis' 11-mile Skyway network. This fully-enclosed, climate-controlled grid connects the second and third levels of downtown buildings over a 69-block area. Inaugurated in August 1962, it has grown into the largest system of its kind in the United States. 

Photo from Wikipedia / "Hephaestos"

CRYSTAL COURT opened in October 1972. The complex was fully-connected with the downtown area's Skyway network in 1974. At this time, the Skyway linked 8 city blocks. CRYSTAL COURT was comprised of 3 levels; the Concourse (or basement), Mall (or ground floor) and Skyway Levels. There were thirty retail stores, restaurants and entertainment venues.