What is "reger-chor"

The Reger-Chor is a project choir founded in 1985 and conducted by Gabriel Dessauer in Wiesbaden. Since 2001 it has grown to Reger-Chor-International in a collaboration with the organist Ignace Michiels of the St. Salvator's Cathedral of Bruges, performing an annual concert both in Germany and Belgium of mostly sacred choral music for choir and organ. Concerts have taken place regularly in St. Bonifatius, Wiesbaden, and in the cathedral of Brugge in its series "Kathedraalconcerten". The choir performed additional concerts at other churches of the two countries and in the Concertgebouw (concert hall) of Brugge.