IDS Center [SEP] architect
were converted to office space. The west-facing "University of Minnesota Alumni Club" closed to the public in 1994. Today, the entire 50th floor consists of four large ballrooms with a single central kitchen. The rooms are collectively known as "Windows on Minnesota," and they serve as banquet space for the Marquette Hotel.
Because of the IDS Center's peculiar and unique stepback design, termed "zogs" by its architect, Philip Johnson, each floor has up to 32 corner offices. The area of
"first fourth-floor skyway". Four other skyways connect Gaviidae Common to 33 South Sixth, 50 South Sixth, IDS Center, and Wells Fargo Center. The skyway adjoining Gaviidae Common I to 33 South Sixth was designed in collaboration between Pelli and Iranian American architect Siah Armajani.