The Diocese of Mercia was created by Diuma in around 656 and the see was settled in Lichfield in 669 by the then bishop, Ceadda (later Saint Chad), who built a monastery there. At the Council of Chelsea in 787, Bishop Higbert was raised to the rank of archbishop and given authority over the dioceses of Worcester, Leicester, Lindsey, Hereford, Elmham and Dunwich. This was due to the persuasion of King Offa of Mercia, who wanted an archbishop to rival Canterbury. On Offa's death in 796, however, the Pope removed the archiepiscopal rank and restored the dioceses to the authority of Canterbury. In 803 the Council of Clovesho accepted this decision.