Mellon Arena (formerly the Civic Auditorium and Civic Arena, nicknamed The Igloo) is an arena in Pittsburgh, Pennsylvania. It primarily serves as the home to the Pittsburgh Penguins, the city's National Hockey League (NHL) franchise. Constructed in 1961, for the use of the Pittsburgh Civic Light Opera (CLO) Mellon Arena has hosted multiple concerts, as well as hockey, basketball, tennis, boxing, wrestling, and soccer matches. The Arena was the world's first major indoor sports stadium with a retractable roof. It is named for Mellon Financial, which purchased the naming rights in 1999.