The Memphis Pyramid, initially known as the Great American Pyramid, formerly referred to as the Pyramid Arena and locally referred to as The Pyramid, the Tomb of Doom and the Bass Pro Shops Pyramid, was originally built as a 20,142-seat arena located in downtown Memphis, in the U.S. state of Tennessee, at the banks of the Mississippi River. The facility was built in 1991 and was originally owned and operated jointly by the city of Memphis and Shelby County; Shelby County sold its share to Memphis in April 2009. Its structure plays on the city's namesake in Egypt, known for its ancient pyramids. It is (about 32 stories) tall and has base sides of ; it is by some measures the tenth-tallest pyramid in the world.