Non-liturgical but related to the Requiem Mass are the numerous so-called 'German Requiems' and other compositions bearing in some form the title 'Requiem'. Composers such as Schütz, Praetorius, Thomas Selle, Michael Haydn, Schubert, J.I. Müller, C. Bütner, J.F. Fasch and Brahms contributed to this category. These 'German Requiems' may derive their texts from the Lutheran Bible, as Brahms's did, of from a variety of Protestant liturgical sources and ceremonies.