Adoro te devote is a Eucharistic hymn written by St. Thomas Aquinas (1225-1274) at Pope Urban IV’s (1261-1264) request when the Pope first established the Feast of Corpus Christi in 1264. The chant melody in Mode V potentially dates from the first millennium.

Videos:
Robert York – Improvisation on ‘Adoro te devote’ – St. Sulpice, Paris