The founding donation of Siresa Historical milestone · Valle de Hecho, La Jacetania, Huesca Image of Valle de Hecho, not of the place itself. The count of Aragon Galindo Garcés and his wife Guldregut donated in 833 lands to the monastery of San Pedro de Siresa, the first written notice of the monastery; tradition places there the upbringing of the future Alfonso I the Battler. 25 de noviembre de 833 Photo: Roberto Abizanda (CC BY-SA 3.0) What to see and do in Valle de Hecho