Guido Monaco

According to tradition, Guido d’Arezzo was born in Talla around 997 and died in Avellana about 1050. He contributed to the unification of musical notation by inventing a four-line staff on which neumes (symbols indicating notes and sets of notes) were placed. He also invented the names of the notes, taking them from the first stanza of a hymn to St John the Baptist, Ut queant laxis.