Two historians say they have found the famed Holy Grail, the vessel that Jesus Christ used at the Last Supper, at a museum in Spain.

Their 3-year search for the jewel-encrusted cup led them to San Isidro Basilica in northern Spain. The historians say their research conlcudes that a goblet in the church is the 'Holy Grail' and it was given to King Fernando I, who ruled between 1037 and 1065, as a peace offering by the head of a Muslim kingdom within Spain.

Margarita Torres and Jose Manuel Ortega del Rio wrote "Kings of the Grail," a book published last week that outlines their investigation.

Throngs of visitors to the museum after the news broke caused the chalice to be pulled from display until a larger viewing space is found.