Hucbald ( – 20 June 930; also Hucbaldus or Hubaldus) was a Benedictine monk active as a music theorist, poet, composer, teacher, and hagiographer. He was long associated with Saint-Amand Abbey, so is often known as Hucbald of St Amand. Deeply influenced by Boethius' De Institutione Musica, Hucbald's (De) Musica, formerly known as De harmonica institutione, aims to reconcile ancient Greek music theory and the contemporary practice of Gregorian chant with the use of many notated examples. Among the leading music theorists of the Carolingian era, he was likely a near contemporary of Aurelian of Réôme, the unknown author of the Musica enchiriadis, and the anonymous authors of other music theory texts Commemoratio brevis, Alia musica, and De modis. Life Born in northern France, about 840 or 850, Hucbald studied at Elnone Abbey (later named Saint-Amand Abbey, after its 7th-century founder) where his uncle Milo was chief master of studies (scholasticus), in the diocese of Doornik. He made rapid progress in the sciences of the quadrivium, including that of practical music, and, according to a laudatory 11th-century biographical account, at an early age composed a hymn in honour of St Andrew, which met with such success as to excite the jealousy of his uncle. It is said that Hucbald in consequence was compelled to leave Saint-Amand and to seek protection from the bishop of Nevers. He was also a companion of studies of such future masters as Remigius of Auxerre and Heiric of Auxerre, perhaps as a disciple of the court philosopher Johannes Scottus Eriugena. In 872 he was back again at Saint-Amand as the successor in the headmastership of the monastery school of his uncle, to whom he would have been presumably reconciled. Between 883 and 900 Hucbald went on several missions to reform and reconstruct schools of music damaged or destroyed by the Norman, including those of St. Bertin and Rheims. In 900, however, he returned to Saint-Amand, where he remained until his death on 20 June 930. Works Music theory The only theoretical work which can positively be ascribed to Hucbald is his Musica (formerly known as De harmonica institutione), probably written about 880. The work shows considerable influence from the writings of Boethius, and by extension Ptolemy. The Musica enchiriadis, published with other writings of minor importance in Gerbert's Scriptores de Musica, and containing a complete system of musical science as well as instructions regarding notation,