Opened in 1950 with a seating capacity of more than 14,000, Ahearn Field House was one of the first and largest purpose-built basketball arenas in the country. It was the largest arena in the state of Kansas until the construction of Allen Fieldhouse at the University of Kansas in 1955. Changing fire codes over the years forced changes to the seating arrangements that eventually reduced seating capacity to 12,220 for the 1987-1988 season, the final season of men's basketball at Ahearn.