AMBROSIAN, in Church History.—We frequently read of the Ambrosian Rite, the Ambrosian Office, &c. denoting a particular Office, or Formula of Worship, used in the Church of Milan; which is sometimes also called the Ambrosian Church. See RITE, OFFICE, &c. We also meet with the Ambrosian Chant, or Song; which was distinguished from the Roman, in that it was stronger and higher.

The Term takes its rise from St. Ambrose, Archbishop of Milan in the IVth Century, who is usually supposed to have been the Author of this Office. Yet some are of Opinion, the Church of Milan had an Office different from that of the Church of the Roman, and other Churches of Italy, before the Time of that Father.



In effect, till the Time of Charlemagne, each Church had its several Office: And when in after-Days the Pope took on him to impose the Roman Office on all the other Churches of the West; that of Milan sheltered itself from the Imposition, under the Name and Authority of St. Ambrose; from which Time, the Phrase Ambrosian Rite has obtained, in contradistinction to the Roman Rite. The public Library of Milan is also called the Ambrosian Library. See LIBRARY.