The Holy Chalice, also known as the Holy Grail, is in Christian tradition the vessel that Jesus used at the Last Supper to serve wine. The Synoptic Gospels refer to Jesus sharing a cup of wine with the Apostles, saying it was the covenant in his blood. The use of wine and chalice in the Eucharist in Christian churches is based on the Last Supper story. In the late 12th century, the author Robert de Boron associated the pre-existing story of the Holy Grail, a magical item from Arthurian literature, with the Holy Chalice. This association was continued in many subsequent Arthurian works, including the Lancelot-Grail (Vulgate) cycle, the Post-Vulgate Cycle, and Sir Thomas Malory's Le Morte d'Arthur. A cup kept in the Spanish Cathedral of Valencia has been identified since Medieval times as the purported Holy Chalice used at the Last Supper. Last Supper The Gospel of Matthew (26:27-29) says: And He took a cup and when He had given thanks He gave it to them saying "Drink this, all of you; for this is My blood of the covenant, which is poured out for many for the forgiveness of sins. I tell you, I shall not drink again of the fruit of the vine until I drink it new with you in My Father's kingdom." This incident, traditionally known as the Last Supper, is also described by the gospel writers, Mark and Luke, and by the Apostle Paul in I Corinthians. With the preceding description of the breaking of bread, it is the foundation for the Eucharist or Holy Communion, celebrated regularly in many Christian churches. The Bible makes no mention of the cup except within the context of the Last Supper and gives no significance whatsoever to the object itself. St. John Chrysostom (347–407 AD) in his homily on Matthew asserted: The table was not of silver, the chalice was not of gold in which Christ gave His blood to His disciples to drink, and yet everything there was precious and truly fit to inspire awe. The pilgrim Antoninus of Piacenza (AD 570) in his descriptions of the holy places of Jerusalem, said that he saw "the cup of onyx, which our Lord blessed at the last supper" among many relics displayed at the Basilica erected by Constantine near to Golgotha and the Tomb of Christ. Herbert Thurston in the Catholic Encyclopedia (1908) concluded that: No reliable