Corpus Christi

The Solemnity of the Most Holy Body and Blood of Christ celebrates the Real Presence of Jesus in the Eucharist, in which his one sacrifice is made present at every Mass. It falls on the Thursday after Trinity Sunday, transferred in the United States to the following Sunday. It began through St. Juliana of Liège and was made universal by Urban IV in 1264.

What it celebrates

Corpus Christi celebrates Christ's Real Presence and reminds us that at every Mass his one sacrifice is made present and offered for the sins we daily commit (CCC 1366). Holy Thursday recalls the institution of the Eucharist, when Jesus told the apostles to do this in memory of him (Luke 22:19), offering himself under bread and wine after the manner of Melchizedek (1 Corinthians 11:23-26; see Genesis 14:18-20; Hebrews 5:1, 7-10). Holy Thursday's joy is tempered by the Passion; Corpus Christi, coming after the Easter season, gives a separate, joyful occasion to adore the Eucharist, including in public devotion. It affirms transubstantiation and invites deeper devotion.

When it is celebrated

It falls on the Thursday after Trinity Sunday, mirroring Holy Thursday. In most U.S. dioceses and many countries it is moved to the following Sunday so more can take part; there it is not a separate holy day of obligation, but the Sunday obligation applies. In some countries the Thursday is a holy day.

How it began

St. Juliana of Liège, a thirteenth-century Norbertine, saw in a vision a moon with a dark spot, signifying the lack of a feast honoring the Real Presence. With support from Archdeacon Jacques Pantaléon, later Urban IV, it was first celebrated at Liège in 1246. In 1264, a year after the Miracle of Bolsena, Urban IV made it universal with the bull Transiturus de hoc mundo.

In 1263 at Bolsena, a German priest, Peter of Prague, troubled by doubts about the Real Presence, saw blood seep from the Host after the consecration, staining the corporal, which he brought to Urban IV at nearby Orvieto. Pilgrims still visit the Basilica of St. Christina in Bolsena and the Cathedral of Orvieto, which keeps the corporal. St. Carlo Acutis, who said "The Eucharist is the highway to heaven," cataloged such miracles to help people believe, and his exhibit is often displayed at Corpus Christi.

Hymns and processions

Urban IV commissioned St. Thomas Aquinas to write the feast's texts, including the Pange Lingua (with the Tantum Ergo), Lauda Sion and Adoro Te Devote. In a Eucharistic procession, often right after Mass, the Blessed Sacrament is carried in a monstrance through the streets, symbolizing the mission to carry Christ to the world (Matthew 28:18-20) and professing his Real Presence (John 6:53-58; Matthew 26:26-28). Spain, Poland and Austria keep it as a public holiday; in the U.S. processions grew during the National Eucharistic Revival (2022-2025).

Ways to celebrate

Attend Mass, join a procession, attend adoration or benediction, sing Aquinas's hymns, pray the Anima Christi, the Divine Mercy Chaplet or the Luminous Mysteries, and reflect on the Real Presence.