I sang Vater Unser as a member of Die Zeitlupe during a memorable "Tischabendmahl" on Maundy Thursday in 2006 in Michaelskirche Bremen-Grohn. It is the Germqn equivalent of The Lord's Prayer and was composed by Christian Heinrich Rinck. Sung slowly and deliberately - no church service should be conducted without it.
Vater Unser can be found in the Evangelisches Gesangbuch (blau) page 46.