The Mainzer Kammerorchester is a chamber orchestra based in Mainz, the capital of the German state Rhineland-Palatinate. It was founded in 1955 by Günter Kehr.[1][2] Its members are mostly professional orchestra players, and some instrumental students. Depending on a project, between eight and 25 players are recruited from this pool. The orchestra toured the globe, especially during the first 30 years. They produced around 130 recordings, especially for broadcasters.[1] After Kehr's death in 1989, Volker Müller succeeded him, the vice president of the Peter Cornelius Conservatory. When he retired in 2017,[3] his wife Renate Kehr took over the leadership.[1]