Bewnans Ke (The Life of Saint Ke) is a Middle Cornish play on the life of Saint Kea or Ke, who was venerated in Cornwall, Brittany and elsewhere. It was written around 1500 but survives only in an incomplete manuscript from the second half of the 16th century. The play was entirely unknown until 2000, when it was identified among the private collection of J. E. Caerwyn Williams, which had been donated to the National Library of Wales after his death the previous year. The discovery proved one of the most significant finds in the study of Cornish literature and language.