Koželuh was born on 14 December 1738 in
Velvary, Bohemia. He was a pupil of
Josef Seger and studied under the
Jesuits. He studied in
Vienna under
Christoph Willibald von Gluck and
Florian Gassmann. In 1784, he became a concert master in
St. Vitus Cathedral for thirty years and the organist at the
Strahov Monastery. His works includes 45
Masses, a
Requiem, an
oratorio, two
operas, four
symphonies, and several woodwind
concertos. As one of the most respected Czech composers of his time, he also composed serious Italian operas: ''Allesandro nell' Indie
was performed in 1769 and Demofoonte ''in 1772. He was the teacher of his cousin
Leopold Koželuch, whose name was originally also Jan Antonín Koželuh, but who changed his name in 1773. Koželuh died on 3 February 1814 in
Prague. ==References==