Peter Of Blois, Or Petrus Bleseosis, an ecclesiastical writer, born in Blois, France, about 1130, died in England about 1200. He studied at Paris and Bologna, and was afterward a pupil of John of Salisbury, bishop of Chartres. In 1167 he went to Sicily, where he became tutor to the young king William II., and guardian of the seal; but having excited the jealousy of the Sicilians, he returned to France, and in 1175 accepted an invitation from Henry II. to settle in England, was made archdeacon of Bath and chancellor of the diocese of Canterbury, visited Rome on ecclesiastical business during the pontificates of Alexander III. and Urban III., and in the latter part of his life received the archdeaconry of London. By command of the king he made a collection of his letters, 183 in number; besides which there are extant several of his sermons, treatises on doctrinal and ethical subjects, and a work on canon law and process. His works were published in Paris (fol., 1519; best ed., 1667), and in vol. cvii. of Migne's Patrologie la tine.