the monastic foundation was strong enough to take over the cathedral. Another tradition claims that, instead, Oswald expelled any of the clergy in the cathedral that would not give up their wives and replaced them with monks immediately. Oswald also reformed Winchcombe Abbey, along with the monasteries of Westbury Priory, Pershore Abbey, and Evesham Abbey. It is also possible that monasteries were established in Gloucester and Deerhurst, but evidence is lacking for their exact foundation dates. Archbishop of York In 972 Oswald was made Archbishop of York and journeyed to Rome to receive a pallium from Pope John XIII. It is possible that he also travelled on Edgar's behalf to the court of the Emperor Otto I, and that these two journeys had been combined. He continued to hold the see of Worcester in addition to York. The holding of Worcester in addition to York became traditional for almost the next fifty years. Although it was uncanonical, it had many advantages for York in that it added a much richer diocese to their holdings, and one which was more peaceful as well. When Edgar died in 975, Ælfhere, Ealdorman of Mercia, broke up many monastic communities, some of which were Oswald's foundations. Ramsey, however, was not disturbed, probably due to the patronage of Æthelwine, Ealdorman of East Anglia, son of Æthelstan Half-King. Ælfhere was a supporter of Ethelred the Unready, the son of Edgar's third marriage, while Oswald supported the son of Edgar's first marriage, Edward the Martyr, in the dispute over who would succeed King Edgar. In 985, Oswald invited Abbo of Fleury to come to Ramsey to help found the monastic school there. Abbo was at Ramsey from 985 to 987, where he taught computus, or the methods for calculating Easter. It was also often used in trying to calculate the date of the Last Judgment. A surviving manuscript gives a list compiled by Oswald, setting forth estates that had been taken from the diocese of York. Death and sainthood Oswald died on 29 February 992 in the act of washing the feet of the poor at Worcester, as was his daily custom during Lent, and was buried in the Church of St Mary at Worcester. He promoted the education of the clergy and persuaded scholars to come from Fleury and teach in England. A Life of Oswald was written after his death, probably by Byrhtferth, a monk