Note 54 — Chapter VII · LATIN POETIC IN THE TWELFTH AND THIRTEENTH CENTURIES
Reading edition
The doctrine of transubstantiation was promulgated by Innocent III at the Fourth Lateran Council in 1215; the feast of Corpus Christi, by Urban IV in 1264, for the Thursday after Trinity Sunday. The proper hymns were written by St. Thomas Aquinas: Lauda, Sion for the sequence of the Mass; Pange, lingua (containing Tantum ergo), Sacris sollemniis, Verbum supernum (containing O salutaris), for the office; Adoro te devote, for adoration. See AH 50: 583-591; Britt, pages 173-192.