On 3 July 2006, a major mass transit disaster, the Valencia Metro derailment, left 43 dead and 47 wounded. Days later, on 9 July, the World Day of Families, during Mass at Valencia's Cathedral, Our Lady of the Forsaken Basilica, Pope Benedict XVI used the "Sant Calze", a 1st-century Middle-Eastern artifact that some Catholics believe is the Holy Grail.