PIETRO di CASA (de Caesis, de Casis, Des-Maisons). - Patriarch of Jerusalem, born in Limoges in the second half of the 13th century, died at Entrecahuax in France on 3 August 1348.
A Carmelite friar, he obtained a doctorate in theology at Paris. Provincial of Aquitaine (1324), then Prior General (1330), he took part in the solemn assembly of prelates and doctors held at Vincennes, where it was commonly agreed, against the personal opinion of John XXII, that souls completely purified are immediately admitted to the beatific vision before the Last Judgment. On 17 December 1341, he was appointed Bishop of Vaison by Benedict XII. On 7 October 1342, Clement VI named him Patriarch of Jerusalem, with perpetual administration of the diocese of Vaison. He died in a reputation for holiness and was honored by many writers of his Order with the title of blessed, though his cult has not yet been officially recognized. The General Chapter of 1908 decided to promote his cause before the Sacred Congregation of Rites.
Trisse reports that P. wrote a commentary on the Four Books of the Sentences, as well as a collection of sermons or Collationes. J. Bale attributes to him also a commentary on Aristotle’s Politics.