The Palestra, Philadelphia

Penn's home since it opened in 1927, shown empty in 2016 so the arched steel roof trusses and skylights read clearly. That truss system gave every seat an unobstructed view of the floor, a big deal for an arena of its era, and it is why the building earned the name "Cathedral of College Basketball." It hosted the East Regional of the first NCAA tournament in 1939 and is the traditional home of Philadelphia's Big 5 rivalries, and it has staged more college basketball games than any other arena.