 He was a child prodigy, having composed his first Mass at age 12; his best known Mass is the "Misa Jubilei," written in the Holy Year 1950.The body of his work already published fills more than forty volumes and includes Masses, motets, madrigals, hymns, symphonic, organ, and chamber music, and above all a series of oratorios for soloists, chorus, and orchestra.His three-act opera "Brunelleschi" is yet to be performed.