This work serves as a liturgical setting of the Magnificat and Nunc Dimittis, designed for performance within the context of the Anglican Church service. The composition, attributed to William Byrd, utilizes the specific vocal requirements of the Tudor period to provide a structured musical framework for evening prayer. It functions as a primary source for understanding the development of English church music during the late sixteenth century.

Musicologists and choral directors frequently cite this work as a foundational example of Byrd's contribution to the English liturgical tradition. Experts often note the technical complexity of the vocal lines, which require a high degree of proficiency in polyphonic performance.