The conquest of Jérica Historical milestone · Jérica, El Alto Palancia, Castellón Image of Jérica, not of the place itself. The Christian host commanded by Guillem de Montgrí took the fortified town that guarded the passage of the Palancia towards Aragon; in 1249 a settlement charter was granted to attract colonists to the district. 1235 Photo: Enrique Íñiguez Rodríguez (Qoan) (CC BY-SA 3.0) What to see and do in Jérica