The settlement charter of Aínsa Historical milestone · Aínsa-Sobrarbe, Sobrarbe, Huesca Image of Aínsa-Sobrarbe, not of the place itself. Alfonso I the Battler granted the town in 1124 a settlement charter and the fuero of Jaca to strengthen the defense of the frontier and attract merchants; the privilege turned the borough below the castle into the economic head of the Sobrarbe. 1124 Photo: José Luis Filpo Cabana (CC BY-SA 4.0) What to see and do in Aínsa-Sobrarbe