The nonprofit arts and cultural industry in Allegheny County generates $341 million in economic activity that supports over 10,000 full-time equivalent jobs with nearly $34 million in local and state taxes raised. A leader in environmental design, the city is home to 60 total and 10 of the world's first green buildings while billions have been invested in the area's Marcellus natural gas fields. A renaissance of Pittsburgh's 116-year-old film industry—that boasts the world's first movie theater—has grown from the long-running Three Rivers Film Festival to an influx of major television and movie productions. including Disney and Paramount offices with the largest sound stage outside Los Angeles and New York City. Pittsburgh has hosted many conventions, including INPEX, the world's largest invention trade show, since 1984; Tekko, a four-day anime convention, since 2003; Anthrocon, a furry convention, since 2006; and the DUG East energy trade show since 2009. Pittsburgh has a rich history in arts and culture dating from 19th century industrialists commissioning and donating public works, such as Heinz Hall for the Performing Arts and the Benedum Center, home to the Pittsburgh Symphony Orchestra and Pittsburgh Opera, respectively as well as such groups as the River City Brass Band and the Pittsburgh Youth Symphony Orchestra. Pittsburgh has a number of small and mid-size arts organizations including the Pittsburgh Irish and Classical Theatre, Quantum Theatre, the Renaissance and Baroque Society of Pittsburgh, and the early music ensemble Chatham Baroque. Several choirs and singing groups are also present at the cities' universities; some of the most notable include the Pitt Men's Glee Club and the Heinz Chapel Choir. Pittsburgh Dance Council and the Pittsburgh Ballet Theater host a variety of dance events. Polka, folk, square, and round dancing have a long history in the city and are celebrated by the Duquesne University Tamburitzans, a multicultural academy dedicated to the preservation and presentation of folk songs and dance. Hundreds of major films have been shot partially or wholly in Pittsburgh. "The Dark Knight Rises" was largely filmed in Downtown, Oakland, and the North Shore. Pittsburgh has also teamed up with a Los Angeles-based production company, and has built the largest and most advanced movie studio in the eastern United States. Pittsburgh's major art museums include the Andy Warhol Museum, the Carnegie Museum of Art, The Frick Pittsburgh, Pittsburgh Center for the Arts, and the Mattress Factory.