The Bishop of the Isles or Bishop of Sodor was the ecclesiastical head of the Diocese of the Isles (or Sodor), one of Scotland's thirteen medieval bishoprics. The bishopric, encompassing both the Hebrides and Mann, probably traces its origins as an ecclesiastical unity to the careers of Olaf, King of the Isles, and Bishop Wimund. Previously, there had been numerous bishoprics and recorded bishoprics include Kingarth, Iona, Skye and Mann. There were very likely numerous others.