The legend of the Sacred Grail has been told and retold in various cultures and languages for hundreds of years. First mentioned in the late 12th century by French author Chrétien de Troyes in Perceval: ou le Conte du Graal, the story of the legendary vessel and the quest to find it became increasingly popular during the 19th century. Even today, the appeal of the quest is universal because the Grail has never been found or even unambiguously identified. The ownership of the Grail has been attributed to various groups, mainly to the Knights Templar, because it allegedly represents the cup of the Last Supper that collected Christ's blood upon his removal from the Cross.
Theories abound as to where the cup comes from, where it traveled, and where it ended up. One says the Knights Templar took it from Jerusalem during the Crusades. Thereupon, we find cups in several churches all across Europe. Another theory says that the history of the Grail can be traced to the 11th century somewhere in the Middle-East, while evidence presented by some scholars suggests that the origin of the grail legend lies in Celtic myth. Today, there are at least five known places that claim ownership of the Grail. Some researchers went even further by claiming that Jesus may not have even died on the Cross, but lived to wed Mary Magdalene and father children whose Merovingian bloodline has persisted until this very day.