The San Francisco Symphony (SFS), founded in 1911, is an orchestra based in San Francisco, California. Since 1980, the orchestra has performed at the Louise M. Davies Symphony Hall in the City's Hayes Valley neighborhood. The San Francisco Symphony Youth Orchestra (founded in 1981) and the San Francisco Symphony Chorus (1972) are part of the organization. Its current music director is Michael Tilson Thomas, who has held the position since September 1995.