Theology · Updated August 15, 2026
Transubstantiation, the belief that bread and wine become the actual body and blood of Christ during the Eucharist, wasn't officially defined by the Church until over 1,200 years after the Last Supper. The gradual development of theological doctrines within the Christian tradition explains this delay in formal definition. Although the practice of the Eucharist as a central act of worship dates back to the earliest days of Christianity, the precise understanding of how Christ is present in the sacrament evolved over centuries.
In 1215, the Fourth Lateran Council provided the official definition of transubstantiation. This period marked theological consolidation for the Church. The council declared that the bread and wine used in the Eucharist truly become the body and blood of Christ, a doctrine that would become a cornerstone of Catholic belief. This decision came after centuries of theological debate, notably influenced by figures like Paschasius Radbertus in the 9th century, who argued for the real presence of Christ in the Eucharist. In the 11th century, Berengar of Tours challenged this concept, sparking further debate. The Church eventually adopted Aristotelian philosophy to articulate this doctrine, using the terms "substance" and "accidents" to explain how the essence of bread and wine could change while their physical appearances remained the same. Later, the Council of Trent in the 16th century reaffirmed this doctrine in the face of challenges from Protestant reformers, who largely rejected the idea of
Today, the doctrine of transubstantiation remains a defining feature of Roman Catholic theology, distinguishing it from many other Christian denominations. Despite the challenges it faced during the Protestant Reformation, the belief has endured as a central tenet of Catholic faith and practice. The Catholic Church continues to teach that during the celebration of the Eucharist, the bread and wine are transformed into the body and blood of Christ, a mystery that remains an expression of faith for millions of Catholics worldwide.
The concept of transubstantiation wasn't officially defined by the Church until over 1,200 years after the Last Supper.
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