Ambrosius Matthias [Ambros] Rieder (10/10/1771 - 19/11/1855), an Austrian musician, theorist and composer, born in Vienna-Döbling, died in Perchtoldsdorf. In 1802 he became choir-master in the church at Petersdorf, near Vienna. Works: Mass for chorus and orchestra ; Requiem for 4 voices, orchestra, and organ ; Graduate, offertories, etc.; Quartets for strings ; Sonatas for piano-forte, violin, and violoncello; Fugues and preludes for the organ ; Many songs, with pianoforte.