Balthasar Siberer (1679–1757) was an Austrian-born German gymnasium teacher, known for having been an early organ instructor of both Johann Ernst Eberlin and Leopold Mozart.
Siberer was born in Schwaz, Tyrol, and at some point moved to Augsburg, Bavaria, where he became a teacher at the Jesuit Gymnasium of St. Salvator. He lectured in grammar and philosophy, but is remembered today for his organ lessons.
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