Hermitage of Alagón Monument · Alagón, Ribera Alta del Ebro, Zaragoza Image of Alagón, not of the place itself. Alagón preserves, besides the church of San Pedro, the church of Nuestra Señora del Castillo; the town occupies the site of the Iberian city of Alaun, later called Allabone in Roman times, and was taken by Alfonso I in 1119. Photo: Vasyatka1 (CC BY-SA 4.0) What to see and do in Alagón