French School, (15th century); French. Medium: stone. Date: 15th Century. Sceau d'Owen, prince de Galles. Owain Glynd?r or Owain Glyn D?r (c.1349 or 1359?c.1416) was a Welsh ruler and the last native Welshman to hold the title Prince of Wales. He instigated a fierce and long-running but ultimately unsuccessful revolt against the English rule of Wales. Provenance: Centre Historique des Archives Nationales, Paris, France / Giraudon. Photographic Rights The Bridgeman Art Library.