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
Norfolk and Norwich Festival of earlier musical fundraisers for the hospital dating back as far as 1772 including the annual performance of an oratorio at Norwich Cathedral. In its early days, the festival was mainly held in St. Andrew's Hall and St Peter Mancroft. These events consisted primarily of oratorios and other large scale choral works performed by the Norwich Festival Chorus, then 300 strong. Noted premieres from this time included "The Last Judgement" by the German Romantic composer and conductor Louis Spohr. The triennial festival continued to develop a reputation throughout the Victorian and Edwardian period, and saw the premieres of significant classical