 It serves as home to several of the university's athletic teams and has hosted numerous National Collegiate Athletic Association Division III regional and University Athletic Association conference championship events.Located at the southwest corner of Ellis Avenue and 55th Street, the Ratner Center has an award-winning design that substitutes a complex external mast and counterweight system for interior support devices to allow for large open-space areas inside the building.Cesar Pelli & Associates Inc. was credited as the design architect and OWP/P was the architect of record.