The charter of Monzón for Estadilla Historical milestone · Estadilla, Somontano de Barbastro, Huesca Image of Estadilla, not of the place itself. At the end of the 11th century, Sancho Ramírez and his son Pedro I granted the settlers of Estadilla the charter (fueros) of Monzón to attract settlers to the frontier; centuries later, José de Calasanz studied at the school that once existed in the village. 1090 Photo: Basotxerri (CC BY-SA 4.0) What to see and do in Estadilla