The area was captured in 1210 by Peter II of Aragon, recovered by Muslims shortly afterwards, and captured in the Reconquista by James I. Castielfabib, along with Ademuz, became part of the Kingdom of Valencia, and held in the royal domain under direct control of the crown. In 1304, the village was used as collateral for a loan from the Knights Templar.
In 1210, Peter II of Aragon seized control; Muslims reclaimed it shortly thereafter, and James I recaptured it during the Reconquista. Castielfabib, along with Ademuz, became part of the Kingdom of Valencia, held in royal domain under direct crown control. In 1304, the village was used as collateral for a Knights Templar loan.