The choral music introduced from the Eastern to the Western
Church by St. Ambrose, the Bishop of Milan, in the fourth century. It
was used till Gregory the Great changed it for the Gregorian.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
More on Ambrosian Chant from Fact Monster:
- Saint Ambrose - Ambrose, Saint Ambrose, Saint , 340?–397, bishop of Milan, Doctor of the Church, b. Trier, of ...