. . . "20"^^ . "Ruy P\u00E9rez Ponce de Le\u00F3n or Rodrigo P\u00E9rez Ponce de Le\u00F3n (b. ? - d. 1295) was a Spanish noble of the House of Ponce de Le\u00F3n, in the service of the Kingdom of Castile. He was the 15th Grand Master of the Order of Calatrava from 1284 to 1295 under King Sancho IV of Castile and further served as Mayordomo Mayor del Rey from 1293 - 1295, also under Sancho IV."@en . "1284"^^ . . . "Ruy P\u00E9rez Ponce de Le\u00F3n"@en . . . "Ruy P\u00E9rez Ponce de Le\u00F3n or Rodrigo P\u00E9rez Ponce de Le\u00F3n (b. ? - d. 1295) was a Spanish noble of the House of Ponce de Le\u00F3n, in the service of the Kingdom of Castile. He was the 15th Grand Master of the Order of Calatrava from 1284 to 1295 under King Sancho IV of Castile and further served as Mayordomo Mayor del Rey from 1293 - 1295, also under Sancho IV."@en . . . . . "Grand Master of the Order of Calatrava"@en . . . . "1293"^^ .