Civic Arena (Pittsburgh)

Civic Arena (formerly the Civic Auditorium and Mellon Arena, nicknamed The Igloo^[7]) was an arena located in the Hill District neighborhood of Pittsburgh, Pennsylvania. The Civic Arena primarily served as the home to the Pittsburgh Penguins, the city's National Hockey League (NHL) franchise, from 1967 to 2010.^[8] It was the first retractable roof major-sports venue in the world, covering 170,000 sq. feet and constructed with nearly 3,000 tons of Pittsburgh steel, and supported solely by a massive 260-foot-long cantilevered arm on the exterior.^[3] Even though it was designed and engineered as a retractable-roof dome, the hydraulic jacks never functioned consistently, thus keeping the roof permanently closed after 1994.^[9] The first roof opening was during a July 4, 1962 Carol Burnett show to which she exclaimed "Ladies and Gentlemen...I present the sky!"^[10]

• http://en.wikipedia.org/wiki/Civic Arena (Pittsburgh)