ヘレス・デ・ラ・フロンテーラ
Álvaro Obertos de Valeto (Jerez de la Frontera 1427 - Jerez de la Frontera March 12, 1482), was a knight of the Spanish nobility, as well as a pious jurist who donated the land for construction of the Charterhouse of Jerez de la Frontera ("la Cartuja de Jerez de la Frontera"), the first stone of which was laid on December 17, 1478.