A chalice and paten were used in the ritual of the Eucharist – the consumption of consecrated bread and wine at the heart of the Mass. According to medieval Catholic theology, when the priest performed the consecration of the bread and wine these elements were transformed so that, although their appearance did not change, they became the body and blood of Christ. The paten held the bread or wafer, while the chalice held the wine. This paten bears an image of Christ as the sacrificial Lamb of God, emphasising the belief that Christ was physically present in the materials of the Eucharist.