St. Ambrose Bishop of Milan
St. Ambrose Bishop of Milan was born in 333 and died in 397.
He is called the “Father of Christian Hymnology” and was canonized after his death.
He regulated the church chance by a code of his own and founded the Ambrosian chant, a particular method of saying and singing the church service, which was used until the year 600 and was succeeded by the Gregorian chant.
He also introduced antiphonal and congregational singing.