Votive Mass for the Coronation of Leo XIV
Processional hymn: Blessed Are the Sons of God, 870
Recessional hymn: Christ is Made the Sure Foundation, 944
Credo III, 776
Kyriale: Mass for Four Voices, William Byrd (c.1540–1623)
Motet after Offertory: Oremus Pro Pontifice, Edgar Pierre Joseph Tinel (1845–1912)
Communion Antiphon: Tu Es Petrus, Heinrich Isaac
For the occasion of the coronation of the Pope, the Mass prescribed is that of the Chair of Peter (observed on February 22). This Mass uses the text Tu Es Petrus extensively in the proper chants. For the Communio, Heinrich Isaac takes inspiration from the original Gregorian melody. Isaac begins with the incipit from the chant and each voice enters individually; the bass voice has keeps the melody throughout. Isaac illustrates building—“…I will build my church.”—by having each voice stack on top of one another and form the only static chord in the middle of this short motet.
Heinrich Isaac (c.1450–1517) was a Renaissance composer from the South Netherlandish region. His output was rivaled only by Orlandus Lassus in number and variety of composition. Most notable of his collections is Choralis Constantinus which contains nearly 400 Gregorian chant based motets of propers for the Mass.