According to lore, St Lawrence was able to spirit away the chalice used during Christ's Last Supper (the "Holy Grail") to Huesca, in present-day Spain, with a letter and a supposed inventory, where it lay hidden and unregarded for centuries. When St Augustine connects St Lawrence with a chalice, it is the chalice of the Mass:
According to Catholic tradition the Holy Grail is a relic sent by St Lawrence to his parents in northern Aragon. He entrusted this sacred chalice to a friend who he knew would travel back to Huesca, remaining in the monastery of San Juan de la Peña, core of spiritual strength for the emerging Kingdom of Aragon. While the chalice's exact journey through the centuries is disputed, it is accepted by many Catholics that it was sent by his family to this monastery for preservation and veneration. Historical records indicate the chalice has been venerated and preserved by a number of monks and monasteries through the ages. Today the Holy Grail is venerated in a special chapel in the Catholic Cathedral of Valencia, Spain.
Bill Phillips: Sounds like something out of a Dan Brown novel