In March 2014, Spanish authors Margarita Torres and José Ortega del Rio asserted the chalice could be the purported Holy Grail.[1] The claim was met with disbelief by some historians and specialists, who claim the materials and techniques used in the chalice indicate a mid-11th century origin,[1] however; the allegations led to unprecedented crowds swarming to the Basilica to see it, which led to the setting aside of a separate exhibition room only for the chalice.[2]
The publication of The Kings of the Grail in March 2014, which claims the chalice is the Holy Grail, led museum staff at the basilica to swiftly withdraw the chalice from display, saying the crowds seeking to visit the museum were too large for it to handle. The museum now displays the chalice in a separate room in the tower alongside the old library.[4]
The researchers say the chalice was transported to Cairo by Muslim travelers and was later given to an emir on the Spanish coast who had assisted victims of a famine in Egypt. From there, the chalice came into the possession of King Ferdinand I of Leon, father of the infantaDoña Urraca of Zamora, as a peace offering by an Andalusian ruler.[6]
According to Torres and del Río, the original onyx cup was likely embellished with gold and gems in the 11th Century CE by the Doña Urraca, and the chalice has been identified with her name since then.[7]
Archaeologists quickly sought to dispel Torres and del Rio's claims, pointing out that an estimated 200 different cups and chalices across Europe "vie for the title". Diarmaid MacCulloch, Professor of the History of the Church at Oxford University, said the claims were "idiotic".[8] The authors expressed uncertainty about whether Jesus actually used the cup.[9]
Dating suggests that the onyx chalice itself was made between 200 BC and 100 AD.[dubious – discuss][citation needed] According to Torres, "the only chalice that could be considered the chalice of Christ is that which made the journey to Cairo and then from Cairo to León — and that is this chalice".[3]
To make the chalice more accessible, in 2017 it was digitalized, modeled in 3D and made available for watching it wearing VR glasses. Visitor to the museum can have the experience of having the virtual chalice in their hands and analyzing all its details.