Diethard Hellmann was a German Kantor, composer and academic teacher, first in Leipzig at the Friedenskirche and the Musikhochschule, then from 1955 in Mainz at the Christuskirche and the Peter Cornelius Conservatory, finally in Munich where he was president of the Musikhochschule München from 1981 to 1988. He was known for a weekly Bach cantata in Mainz, broadcast by SWR.
