Castillo de Castielfabib dominates the valley from atop Monte Fabio, a natural rocky promontory in the Rincón de Ademuz region of Valencia province. This fortress of Arab origins was first conquered by Peter II of Aragon in 1210 following a lengthy siege; the castle gained additional prominence when Peter II presided over the General Courts of Aragon within its walls for three days. After being recovered by Muslims, the castle was definitively reconquered by James I of Aragon, becoming part of the Crown of Aragon with tithe rights granted to the Order of the Temple, which later transferred to the Order of Montesa in 1319. The fortress displays an irregular elongated plan adapted to the rocky terrain, with two concentric, stepped enclosures oriented north to south. Though weathered by time and currently in poor condition with partially collapsed walls, the site remains an important reminder of medieval military strategy in eastern Valencia.