The Symphoniker Hamburg (Hamburg Symphony Orchestra) is a German orchestra based in Hamburg, Germany. Founded in 1957, it is one of the city's three largest orchestras. The Hamburg Symphony Orchestra is the orchestra in residence in the Laeiszhalle, the Hamburg Music Hall. In addition to symphony concerts, the Hamburg Symphony regularly performs as accompanying ensembles for operas and ballets at the Hamburg State Opera House. The orchestra also offers subscription series of children's concerts, and annual open-air concerts held in the central courtyard of Hamburg's town hall.