Final answer:
The Eucharist, also known as Holy Communion or The Lord's Supper, is the fundamental sacrament of Jesus's presence, created during the Last Supper when Jesus blessed bread and wine as his body and blood.
Step-by-step explanation:
The fundamental sacrament of Jesus's presence is often described as the Eucharist, also known as Holy Communion or The Lord's Supper. During the Last Supper, Christ blessed the bread and the wine, instructing His apostles to partake in them as His body and blood, signifying the new covenant and the forgiveness of sins. This sacred ritual, rooted in the incident recounted in Matthew 26, is central to Christian worship and symbolizes Christ's sacrifice for humanity's sins.
Within Christianity, interpretations of the Eucharist can differ. While Catholic and Eastern Orthodox churches believe in transubstantiation – meaning the bread and wine actually become Christ's body and blood during the Eucharist – Protestant denominations typically view it as a symbolic act that commemorates Christ's Last Supper. This sacrament is one of the essential spiritual rituals performed in the Christian church, its importance underlined by its role as a means of connecting worshippers with the divine, vividly depicted in Byzantine church art in scenes like the 'Communion of the Apostles.'