Northwestern National Life Building

It was designed by Minoru Yamasaki as the headquarters of the Northwestern National Life Insurance Company and was opened in 1965.

[2] The building features an 85 foot (26 m) portico that serves as the visual terminus for the Nicollet Mall.

Yamasaki's touches also included reflective pools and landscaping, and he claimed he was designing "a park with a building in it".

In 1978, the company had 850 employees, with some working in nearby offices because the main building had been occupied to capacity.

In 1978, Northwestern National Life announced plans to build a 20-story office tower across Marquette Avenue, which became 100 Washington Square.