Along with the king, royal family, and chief noblemen, the church was a major force in Northumbria. Churchmen were not only figures of spiritual authority, they were major landowners, who also controlled trade, centred at major churches and monasteries in a land without cities and towns. The bishopric of Lindisfarne was held by Cuthbert at Aldfrith's accession; Cuthbert was succeeded by the Irish-educated Eadberht, who would later be Abbot of Iona and bring the Easter controversy to an end, and then by Eadfrith, creator of the Lindisfarne Gospels. The bishops of Lindisfarne sometimes held the see of Hexham, but during Aldfrith's reign it was held by John of Beverley, a pupil and protégé of Theodore, the Archbishop of Canterbury. The bishopric of York was held by Bosa in 685. Wilfrid was given the see in 687, but removed in 691 with Bosa returning to York. The short-lived see at Abercorn, created in 681 for Bishop Trumwine, collapsed in the period after Ecgfrith's death and the first known Bishop of Whithorn was appointed in the reign of King Ceolwulf. Important monasteries existed at Whitby, where the known abbesses tended to be members of the Deiran royal family, at Monkwearmouth-Jarrow, where Bede was a monk, and at Ripon.