The Turku Castle Chamber Choir was founded in spring 1993 and its Artistic Director since the very beginning has been Heikki Seppänen. It has has a repertoire of a cappella music and such large-scale works as Haendel's Messiah, Bach's Christmas Oratorio, Magnificat, St Matthew Passion and St John Passion, Mozart's C Minor Mass and Rossini's Petite messe solennelle. In addition to its own orchestra, the Turku Castle Musicians, it has appeared with the Turku Philharmonic Orchestra, the Lohja Orchestra, the Finnish-Estonian Baroque Orchestra, the Daugavpils Sinfonietta (Latvia) and the Drottningholm Baroque Ensemble.