from around the 1st century AD, and celebrated by Pope Benedict XVI in 2006 as "this most famous chalice" (hunc praeclarum Calicem); Valencia's Holy Chalice is the object most commonly identified as a claimant to being the Holy Grail. The second is the Sacro Catino in Genoa Cathedral, a flat dish made of green glass; recovered from Caesarea in 1101, it was not identified as the Holy Chalice until much later, towards the end of the 13th century. Valencia Chalice The Holy Chalice vessel, or Santo Cáliz, is an agate cup preserved in the Cathedral of Valencia. It is the object most commonly credited as being the actual Holy Grail used by Jesus during the Last Supper. It is preserved in a chapel consecrated to it, where it still attracts the faithful on pilgrimage. The artifact has seemingly never been accredited with supernatural powers. The cup is made of dark red agate which is mounted by means of a knobbed stem and two curved handles onto a base made from an inverted cup of chalcedony. The agate cup is about 9 centimeters (3.5 inches) in diameter and the total height, including base, is about 17 centimetres (7 inches) high. The lower part has Arabic inscriptions. The base, stems and handles are posterior additions, but the red agate cup itself has been most likely produced in a Palestinian or Egyptian workshop between the 2nd century BC and the 1st century AD. It is kept together with an inventory list on vellum, said to have accompanied a lost letter which detailed state-sponsored Roman persecution of Christians that forced the church to split up its treasury and hide it with members, specifically the deacon Saint Lawrence. The first explicit inventory reference to the present Chalice of Valencia is found in an inventory of the treasury of the monastery of San Juan de la Peña drawn up by Don Carreras Ramírez, Canon of Zaragoza, on the 14th of December 1134. The Chalice is described as the vessel in which "Christ Our Lord consecrated his blood" (En un arca de marfil está el Cáliz en que Cristo N. Señor consagró su sangre, el cual envió S. Lorenzo a su patria, Huesca). Reference to the chalice is made again in 1399, when it was given by the monastery of San Juan de la Peña to king Martin I of Aragon in exchange for a gold cup.