GLAREANUS (HENRICUS LORITUS GLAREANUS, Enrico de Loris). — Philosopher, mathematician, theologian, musician, and poet, born at Glarus (Switzerland) in 1488, died at Fribourg on 28 March 1563. He studied at Cologne with G. Coclico, and in 1517 moved to Paris, where he taught philosophy in a college he had founded; but after barely a year he went to Basel and in 1529 settled at Fribourg, where he taught history and philosophy. A man of vast learning in every field, he was a friend of the most illustrious men of his time. Though not indifferent to Protestant innovations, he remained steadfastly a Catholic.
Among his many works in philosophy, history, and literature, notable are the *Isagoge in musicen* (Basel 1516) and the *Dodekachordon* (ibid. 1547). This latter work, later reprinted in three volumes under the definitive title *De musicen definitione ac divisione* (ibid. 1560), was highly esteemed, so much so that J. L. Wonegger published an excerpt under the title *Musice epitome ex Glareani Dodekachordon* (ibid. 1557). P. Böhm in vol. XVI of *Gesellschaft für Musik* (Leipzig 1889) issued a complete translation of the *Dodekachordon* with modern musical examples. He also studied and translated Boethius, later printed by Rota in 1770. In testimony of his affection for his native land, he wrote a Latin poem entitled *Helvetiae descriptio et in laudatissimum Helvetiorum foedus panegyricus* (ibid. 1515).