German chamber orchestra, specializing in the revival and performance of unknown works, especially from the Baroque era. It was established in Munich in 1983 by , who also led the ensemble as concertmaster until 1995. The ensemble takes its name from Giovanni Battista Maccioni's dramatic cantata L'arpa festante ("The Festive Harp") which was first performed in 1653, inaugurating what was to become the Bavarian State Opera.