MADISON — The Solemnity of the Most Holy Body and Blood of the Lord, or Corpus Christi, celebrates the Eucharist in more focused way than Holy Thursday. It is traditionally celebrated on the Thursday after Trinity Sunday, although in many places it is transferred to Sunday.
In 1246, Robert of Thourotte, Bishop of Liège in Belgium, had instituted a feast for the Eucharist at the request of an Augustinian nun and mystic, St. Juliana of Cornillon. Corpus Christi was established for the whole Church by Pope Urban IV in 1264. Its Mass and Office were composed by St. Thomas Aquinas (+1274).