Castillo de Pola

Castillo de Pola is a medieval fortress in the municipality of Torres de Berrellén, in the province of Zaragoza, in the Aragón region of Spain. Its ruins sit on a hilltop above the left bank of the Ebro River, between the towns of Torres de Berrellén and Remolinos, overlooking the site of a former settlement known as Pola.

What is the history behind it?

The fortification dates back to the period of Muslim rule in Al-Ándalus. Castillo de Pola formed part of the defensive line protecting Zaragoza, alongside other strongholds in the area such as Castellar, Santa Inés, Miranda and Rueda. In 1101, during the campaigns of King Pedro I, the castle passed into the hands of the Kingdom of Aragón. It also played a role in the 1118 siege of Zaragoza (then known as Saraqusta) by the crusading army of Alfonso I the Battler.

After the Christian reconquest, the castle became royal property before passing through the hands of several noble families, including the houses of Luna, Urrea and Cerdán. At the foot of the hill lay a settlement once home to both Christian and Muslim inhabitants; it was abandoned by the 17th century at the latest. The structure itself is dated to between the 11th and 13th centuries.

What can you see today?

Little remains of the original stronghold beyond sections of walls built from stone and gypsum (aljez), largely blended into the surrounding landscape. Underground, a gallery survives leading to an old cistern (aljibe), and the foundations of what were likely tower structures can still be traced in places. Close by stand the ruins of two churches tied to the abandoned settlement: the church of Santa Elena, which retains a brick apse with traces of pointed arches, and the church of Santa Inés, also reduced to ruins.

The whole complex — the castle together with the remains of the settlement and its churches — is registered as an archaeological zone under Aragón's cultural heritage law of 1999, with the formal listing published in the Boletín Oficial de Aragón in May 2006.

How do you get there?

The ruins stand on high ground near Torres de Berrellén, within the Ribera Alta del Ebro district, close to the Ebro River. Access is via local roads linking Torres de Berrellén with neighbouring Remolinos, with the final stretch to the ruins covered on foot up the hillside. Given the site's ruined state, it's worth visiting as part of a broader tour of heritage sites along the Ebro valley in this part of Aragón.

When should you visit?

The site sits on open, largely shadeless ground, so the cooler months — spring and autumn — make for the most comfortable visits, with milder temperatures than the height of summer in the Ebro valley. Dry conditions underfoot also make the climb up the hill easier after rain.

Frequently Asked Questions

Is Castillo de Pola well preserved? No — the site survives only as ruins, with sections of wall, an underground gallery leading to a cistern, and the foundations of former towers.

Where does the castle's name come from? It comes from the nearby, now-vanished settlement of Pola, which once spread out at the foot of the hill.

Are there other historic sites nearby? Yes — right next to the castle stand the ruins of two medieval churches, Santa Elena and Santa Inés, both linked to the former settlement.

Is access to the ruins free and open? The ruins sit on open ground reached on foot from the hillside, though visitors should take care given the site's ruined condition.