The Konzerthausorchester Berlin (until 2006 known as the Berlin Symphony Orchestra in English and Berliner Sinfonie-Orchester in German) is a major symphony orchestra from Berlin, Germany. It was founded in 1952 in East Berlin. The Berlin Philharmonic Orchestra, which had been founded ninety years earlier, was housed in West Berlin after the division of Berlin by the Allies after World War II.
The home of the orchestra is the Konzerthaus Berlin, designed by the architect Karl Friedrich Schinkel. The building was destroyed during World War II, and was rebuilt in between 1979 and 1984.
The orchestra performs around 100 concerts there every season. Apart from the masterworks of the classic-romantic tradition, the repertoire also comprises less frequently played compositions from those still being discovered to contemporary classical music. Invitations to perform have taken the orchestra around the world, in 2005 the BSO toured China, Japan and Korea. In 2006 there were be performances in Spain and southern Germany. As of October 2006 the Chief Conductor is Lothar Zagrosek.