Ugolino of ForlìUgolino of Forlì or Ugolino of Orvieto was an Italian music theorist and composer of early Renaissance music.Life and careerUgolino was born in Forlì, but was named Urbevetano because his father, Francesco, was from Orvieto. He died at Ferrara.WorksDeclaratio musicae disciplinae, written during the beginning of his time in Ferrara.