930 deaths

60th emperor of Japan

Islamic Mathematician

thumb|Hucald's Musica, page 125 in the Codex 169(468) from the Abbey library of Saint Gall 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

Chu prince

Count of Poher

Islamic legal scholar

Iraqi poet