Glareanus, Henricus (1488–1563)

Swiss music theorist. He studied the relationship between the Greek and the church modes and wrote treatises, notably Isagoge in musicen (1516) and Dodecachordon (1547), containing his new theory of 12 church modes.

He studied music at Berne and Cologne, Germany, and taught at Basel, Switzerland, from 1515 and again from 1522, after holding a professorship in Paris, France, from 1517 on the recommendation of Erasmus of Rotterdam. In 1529 he settled at Freiburg im Breislau, Germany.