The Saint Grail, the main relic of Christianity, is the cup of Christ that was used at the Last Supper to give communion to apostles, and his blood was collected into this cup after while. The works of art about this mysterious cup suddenly appeared in the western culture at the end of XX century. Later on this mysterious and enigmatic image, which exceeds the bounds of habitual spirituality, personified the inaccessible ideal of Christianity.

In spite of the fact that there are almost no mentions about the Grail in Christian Europe after the 1204 and that it was considered to be lost for the sinful mankind, at the same time we can find the evidences about the Grail in the mediaeval Crimean state of Theodoro which was founded after Constantinople had fallen.