In what year was the cathedral, that Arnao de Vergara produced several windows for, registered as a World Heritage Site?
Arnao de Vergara Arnao de Vergara was a 16th-century Spanish master glassmaker. Between 1525 and 1536 he produced several windows for Seville Cathedral, many of which survive, before later moving to Granada.
Basilica of San Vitale The "Basilica of San Vitale" is a church in Ravenna, Italy, and one of the most important examples of early Christian Byzantine art and architecture in Europe. The Roman Catholic Church has designated the building a "basilica", the honorific title bestowed on church buildings of exceptional historic and ecclesial importance, although of course it is not of architectural basilica form. It is one of eight Ravenna structures inscribed on the UNESCO World Heritage List.