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
St. Paul and The Broken Bones a live show. After releasing "Greetings from St. Paul and The Broken Bones", the band gained attention from managers and labels alike. In January 2013, they began recording their first full-length album, "Half the City", at the Nutthouse Recording Studios Sheffield, Alabama and Fame Studios in Muscle Shoals, Alabama. While recording the album, the band brought in Al Gamble to play keys. Gamble continued to play with St. Paul and The Broken Bones and has been a full-time member since January 2014. "Half the City" was produced by Ben Tanner of the Alabama Shakes. In February 2013, St. Paul and