Former capacity Ryan Field was a stadium in the central United States, located in Evanston, Illinois, a suburb north of Chicago.

The stadium closed at the end of the 2023 season, and preparation for demolition began on January 29, 2024, to make way for a new Ryan Field on the site.

[10] A preliminary proposal featured both the west and east grandstands having symmetrical triple decks but was never realized because of cost overruns resulting from an accelerated construction schedule and average attendance figures that rarely approached 50,000.

The Chicago Bears played their first home game of the 1970 season against the Philadelphia Eagles at Dyche Stadium on September 27 as an experiment; the NFL had required that the Bears move out of Wrigley Field because its seating capacity was under 50,000, which was below the minimum set out by the newly constituted post-merger NFL.

Also, the Chicago Cubs were in a September pennant race with the Pittsburgh Pirates and New York Mets in the National League East.

Like other modern venues, the stadium will have a canopy for spectator weather protection and for sound retention as a competitive advantage.

[21] Northwestern's decision to rename Dyche Stadium to Ryan Field defied the university's own 1926 resolution that forbade such a change.

School officials said that a private institution can override previous boards' decisions, and dismissed the earlier resolution as a "show of appreciation."

But NU did not explain why a mere gesture of appreciation would expressly state that any football stadium at any location would retain the name Dyche, as indeed the 1926 resolution does.