Klaus Mertens and consistency, Klaus Mertens sang in every piece that required a bass soloist, 190 in all." He is also involved in the project Dieterich Buxtehude – Opera Omnia of the same ensemble to record the complete works of Dieterich Buxtehude, begun in 2005. As a singer of lieder, he has interpreted songs of Claudio Monteverdi, Antonio Caldara, Wolfgang Amadeus Mozart and Franz Schubert among others. He has performed the title roles of the romantic oratorios "Elijah" and "St. Paul" by Mendelssohn and, as music of the 20th century, Paul Hindemith's "Requiem" and Igor Stravinsky's "Oedipus rex". In the classical repertory
Church of St. Peter and St. Paul, Angermünde restored. After German reunification the church was converted into a meeting hall. Church of St. Peter and St. Paul, Angermünde The Church of St. Peter and St. Paul () is a former church in Angermünde. It was originally the church of a Franciscan monastery built in the second half of the 13th century and first recorded in 1299. It consists of a nave and a choir and is in the Brick Gothic style. The church's original roof timbers survive and have been dated to around 1440 by dendrochronology, suggesting the church was built at the start of the 15th century.