Castle of Cadrete

Castle of Cadrete stands above the town of Cadrete, in the province of Zaragoza, in the Spanish region of Aragon. It sits roughly 12 kilometers from the city of Zaragoza, making it an easy add-on for travelers exploring the Aragonese capital and its surroundings.

Who built this fortress and why?

The castle's story begins in the 10th century, during a power struggle within the Caliphate of Córdoba. Caliph Abd al-Rahman III ordered its construction after the governor of Saraqusta (the Muslim-era name for Zaragoza) rebelled against Córdoba's authority and refused to follow the caliph's directives. Known at the time as the castle of Qadrit, the stronghold served as a forward base and command post for the siege of the rebellious city between 935 and 937. Perched on high ground within striking distance of Zaragoza, it gave the caliph's forces both a vantage point over the valley and a secure logistical hub for a prolonged blockade.

What happened to the castle in the Middle Ages?

Once the Muslim period ended, the fortress passed through several hands and repeatedly served as a financial guarantee rather than a military asset. In the early 13th century, King Peter II of Aragon pledged the village of Cadrete and its castle as collateral to settle a debt owed to Pedro de Navascués — a common practice in the feudal economy, where land and fortifications backed royal loans. The property changed hands again in 1358, when Miguel Pérez Zapata bequeathed it to the nearby Cistercian monastery of Santa Fe. That transfer shifted the castle's role from a military stronghold to an asset within the monastery's holdings.

Why did the castle fall into ruin?

The turning point came in the early 17th century, with the expulsion of the Moriscos from Aragon. Morisco communities made up a significant share of the region's population, and their forced removal emptied out many surrounding settlements, stripping the castle of the people and resources that had kept it relevant, whether militarily or economically. Left without a function or upkeep, the structure began to deteriorate, and the decline continued for centuries.

Is anything being done to preserve it?

Yes. In 2006, the castle was granted Bien de Interés Cultural status, Spain's top level of heritage protection, formally recognizing its historical value and paving the way for conservation work. Restoration efforts began in 2010, backed in part by Spain's 1.5% Cultural program, a funding mechanism run by the Ministry of Public Works to support the recovery of national heritage sites. As a result, the ruins — still visibly marked by centuries of abandonment — are now stabilized and open to visitors as a tangible link to the region's turbulent past.

Frequently asked questions

How old is the Castle of Cadrete? It dates back to the 10th century, built on the orders of Caliph Abd al-Rahman III in connection with the 935–937 siege of Zaragoza.

Why was the castle built in this exact spot? Its position near Zaragoza, yet outside the city walls, let the besieging forces control the surrounding area and sustain a long blockade of the rebellious city.

Who owned the castle during the Middle Ages? It belonged at different points to the Crown of Aragon — King Peter II pledged it to cover a debt — and from 1358 onward to the Cistercian monastery of Santa Fe.

Can visitors tour the castle today? Yes. Following restoration work that began in 2010, the ruins are open to visitors and have been legally protected as a heritage site since 2006.

How far is the castle from Zaragoza? Cadrete lies about 12 kilometers from central Zaragoza, making it a short drive for a half-day trip.