Johann Georg Albrechtsberger (3 February 1736 – 7 March 1809) was an Austrian composer, organist, and music theorist, widely regarded as one of the leading figures in counterpoint and composition theory during the Classical period. He was a prolific composer of church music, orchestral works, and keyboard pieces, though he is best remembered for his influence as a teacher.
Albrechtsberger was a mentor to several important composers, most notably Ludwig van Beethoven, whom he instructed in counterpoint and fugue. His theoretical writings and pedagogical methods had a lasting impact on 19th-century composition, and his treatises on harmony and counterpoint remain highly regarded. He was also a friend of Haydn and Mozart.
In addition to his teaching contributions, Albrechtsberger held several prestigious positions, including Kapellmeister of St. Stephen's Cathedral in Vienna. He was a composer though his works are little performed today.
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