Conquest of Exea by Alfonso I Historical milestone · Ejea de los Caballeros, Cinco Villas, Zaragoza Image of Ejea de los Caballeros, not of the place itself. Alfonso I the Battler took in 1105 the Muslim stronghold of Siya, which came to be called Exea and remained as a base of operations for the advance towards Zaragoza. The villa was repopulated with Franks and knights, the origin of the surname de los Caballeros. 1105 Photo: José Antonio Gil Martínez from Vigo, Spain (CC BY 2.0) What to see and do in Ejea de los Caballeros