Russia's most prestigious concert venue for classical music, the Grand Hall of the Conservatory was opened in 1901 in the building adjacent to the Moscow Conservatory. The house, which used to seat nearly 2,500, now seats fewer people, but still an impressive 1737, after the recent remodelling. The historic French organ, the Grand Hall's treasure, was a gift to the Moscow Conservatory from the known patron of the arts Sergei von Derwies on the occasion of the Hall's opening. In the 1920s and 1930s, they showed films here, as well as symphony concerts. USSR national chess championships were held here in the 1940s. The finals of the P. I. Tchaikovsky International Music Competition have been held at the Conservatory's Grand Hall since 1958. The Grand Hall's hallmark is its bronze Tchaikovsky monument by Vera Mukhina, installed in 1954 in the park outside the main entrance.