Built in 1926, The Mainstage at Proctors is a beautifully restored historic theatre listed on the National Register of Historic Places. As the premier performing arts facility in New York State's Capital Region, The Mainstage presents the very best in entertainment. While the Mainstage is widely known for presenting the top-tier national Broadway touring productions, it is also the venue of popular performers, world-class singers, side-splitting comedians, electrifying dance programs, world renowned classical productions, including opera and symphony orchestras, as well as family and children's programming. Seating Capacity for Proctors Mainstage: 2,646