ambrosian hymn

Aurora Lucis Rutilat is one of the Ambrosian hymns, but its author is unknown.

Ambrosian hymns, translated by Charles Kraszewski, (Lehman, PA: Libella Veritatis, 1999)

The Te Deum (also known as Ambrosian Hymn or A Song of the Church) is an early Christian hymn of praise.

Collins includes the Latin of Saint Jerome's Bible, of canon law, of the liturgy and papal bulls, of scholastic philosophers, and of the Ambrosian hymns, providing a survey of texts from the fourth century through the Middle Ages.