SEQUENTIA (Prosa; Eng. Sequence, or Prose). A Hymn of peculiar structure, sung on certain Festivals at High Mass, after the Gradual, Versus, Tractus, and Alleluia.
The Sequentia owes its name to its position in the Mass; in which it appears, as the continuation, or sequence, of the long series of Verses and Antiphons, interposed between the Epistle and the Gospel. In the Middle Ages it was called a Prose; because, though written for the most part in rhymed Latin, and frequently...