Holy Grail, object sought by the knights of Arthurian legend as part of a quest that, particularly from the 13th century, had Christian meaning. The term grail evidently denoted a wide-mouthed or shallow vessel, though its precise etymology remains uncertain.

The Holy Grail is a legendary object deeply rooted in Christian mythology and Arthurian literature. Traditionally, it is identified as the cup or chalice used by Jesus Christ at the Last Supper and later used by Joseph of Arimathea to collect Christ's blood during the Crucifixion. While the Grail does not appear in the Bible itself, it became a central symbol of divine grace, purity, and the search for spiritual truth in medieval European romances of the 12th and 13th centuries. The quest for the Holy Grail often represents the ultimate Christian trial, where only the most virtuous and "pure" knights, such as Sir Galahad or Sir Percival, are worthy of witnessing its power. Despite its Christian origins, the legend has occasionally been linked by some scholars to pre-Christian Celtic folklore involving magical cauldrons of abundance. However, in the popular imagination and within the context of the Catholic Church, the Grail remains an enduring symbol of the Eucharist and the physical presence of the divine on Earth.