should be made of the monastery of Nuestra Señora de Veruela, a Cistercian abbey founded by Pedro de Atarés, and now a Jesuit novitiate; also of the Church of Borja, ranking as a collegiate church since the time of Pope Nicholas V (1449), favoured and protected by Pope Alexander VI; and of the ancient collegiate church of Calatayud, Santa Maria de Mediavilla, whose priors ranked as mitred deans. History Roman period Turiaso was one of the principal towns of the ancient Celtiberian province, and within the confines of the diocese are found many very ancient cities: Bilbilis (Calatayud); Aquae Bilbilitanorum (Alhama); Atacum (Ateca); Augustobriga (Muro); Boverca (Buvierca); Bursao (Borja); Cascantum (Cascante); Gracuris (Corella); Monóbriga (Munébrega); and Vergegium (Verdejo). Pliny the Elder numbers Tarazona among the principal cities of the Celtiberians, and its inhabitants had the privileges of citizenship. Its coat of arms bore the motto "Tubal-Cain built me and Hercules rebuilt me". Nothing definite is known of the origin of Christianity in Tarazona. Owing to its proximity to Saragossa it is supposed that it was visited at an early date by the disciples of Saint James the Great, but until the 5th century there is no reliable mention of a bishop of Tarazona. Visigoth period (5th to 7th centuries) The chronicler Idatius names Leo as bishop in 449; the chronological list of bishops gives St. Prudentius, but the history of this saint is uncertain. The Tarazona Breviary gives 390 as his date, but other sources place him as late as the 9th century. Idatius says that Leo was killed in an uprising led by a certain Basilius where the Bagandae took refuge in the cathedral, and in which a great number were killed. St. Gaudiosus, a former monk of the Monastery of Asanense and a disciple of St. Victorian(us), was bishop in 530. He worked against the Arians, and died in his native city, Escoron. His remains were translated to the Monastery of Asanense, and King Sancho Ramirez had them removed to Montearagón. St. Braulius, in his life of St. Emilianus, speaks of a Didymus, Bishop of Tarazona. A Bishop Stephen assisted at the Third Council of Toledo (589) and at the Second Council of Zaragoza (592); Floridius assisted at the Council of Gundemar (611); Elpidius, at the Fourth and Fifth Council of Toledo (633 and 636); Antherius (683) sent a deacon to represent him at the Thirteenth Council of