Other performing arts spaces in the city include the Andrew W. Mellon Auditorium in Federal Triangle, the Atlas Performing Arts Center on H Street, the Carter Barron Amphitheater in Rock Creek Park, Constitution Hall in Downtown, the Keegan Theatre in Dupont Circle, the Lisner Auditorium in Foggy Bottom, the Sylvan Theater on the National Mall, and the Warner Theatre in Penn Quarter. National Theatre in Downtown, which opened in 1835, is the second-longest continuously operating theater in the nation after Walnut Street Theatre in Philadelphia, which opened in 1808.