The Walter Pyramid is located on the campus of the California State University in Long Beach and is a 5,000 seat indoor stadium. It is used for a variety of events. It opened in 1994 and the first event it hosted was the Long Beach men's basketball game versus the University of Detroit Mercy. The game was aired on ESPN and was attended by 5,021, many of whom stood throughout the entire game. The pyramid was designed by Don Gibbs and cost about $22 million to construct. Each side of the pyramid is 345 feet, which makes it a mathematically true pyramid. There are only three true pyramids in the country which include the Pyramid Arena in Memphis, Tennessee and the Luxor Hotel pyramid in Las Vegas. The Walter Pyramid is 18 stores and looks over the Long Beach skyline. It was originally called the Long Beach Pyramid, but was renamed in honor of Dr. Mike and Arline Walter in 2005. The Walters donated a great deal of money to the school. Sports hosted at the pyramid include the men's and women's basketball teams and the men's and women's volleyball teams. Professional sporting events have also been hosted at the pyramid including women's professional baseball and NBA events.