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Castle of Mértola today

Portugal · Restored

Castle of Mértola

Castelo de Mértola

The Castle of Mértola is a medieval hilltop fortress in Mértola, Portugal, dominated by a tall rectangular keep and encircling battlemented walls that overlook the Guadiana River and the town's whitewashed houses. Today it functions as a museum complex but the fortification retains its medieval layout and prominent defensive towers.

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Photograph via Wikimedia Commons

Its prime

1404

Today

Restored

As it stood in 1404

What Castle of Mértola looked like in its prime.

Perched on a rocky hill above the Guadiana and the town's whitewashed houses, the irregular rectangular fortress is built of warm ochre-brown masonry with a continuous circuit of crenellated curtain walls. The silhouette is dominated by a 30 m rectangular keep tower with prismatic merlons and machicolations, flanked by square and rectangular corner towers including a semi-cylindrical tower by the main gate. A barbican and northwestern "traitors' gate" punctuate the walls; a vaulted covered cistern sits in the inner courtyard.

Its story

The story of Castle of Mértola.

Mértola's hilltop above the Guadiana was fortified long before Portugal existed: an ancient river community of commercial importance, it was walled in the last third of the twelfth century under the Almohad dynasty, when the circuit was built to encircle the settlement. Nearby stands the former Islamic mosque, transformed into the Church of Nossa Senhora da Assunção.

Between about 1240–45 and 1316 Mértola was the seat of the Military Order of Santiago. The irregular rectangular fortress carries a 30-metre keep, its first-floor weapons hall roofed with a cross-vault, a "traitors gate" in the north-west wall protected by a barbican, and towers flanking the main gate to the east. At the end of the fifteenth century the alcalde's residence was built against the keep, demolishing much of the north-western battlements; today the well-preserved castle functions as a museum complex.

Step inside

11 places to explore in 1404.

The record describes 11 distinct spots at Castle of Mértola, including 3 interiors: weapons hall (first floor of keep), carocha (southwest) tower interior, inner courtyard and covered cistern. Create your own photoreal reconstruction and explore every one, more scenes means more rooms, more angles, and more of the place to stand in.

Exterior approach from the townApproach along the Guadiana (river side)Principal east gate and flanking towersNorthwest 'traitors' gate and barbicanWalk along the battlementsKeep tower exterior (30 m)Weapons hall (first floor of keep)Top of the keep (parapet observation)Carocha (southwest) tower interiorInner courtyard and covered cisternView from battlements toward the church

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Questions about Castle of Mértola

What is the history of Castle of Mértola?

The history of Castle of Mértola begins with its fortification in the last third of the twelfth century under the Almohad dynasty, when walls encircled the settlement. It became the seat of the Military Order of Santiago between about 1240–45 and 1316. The Portuguese conquest followed in 1238, and later improvements included the keep in 1292 and further fortification work in 1404.

What is inside Castle of Mértola?

Inside Castle of Mértola are a weapons hall, the Carocha Tower interior, an inner courtyard and a covered cistern. The weapons hall occupies the first floor of the keep and has a cross-vaulted ceiling. The Carocha Tower has a covered space with a hemispheric cupola, while the cistern has a vaulted ceiling over three arches.

Why was Castle of Mértola built, and what was it used for?

Castle of Mértola was built as a fortified settlement above the Guadiana, with walls encircling the hilltop community. Its purpose later included military defence: it formed part of the defensive line along the frontier with Spain until the eighteenth century. After losing military importance and being abandoned, it became a museum complex with collections and an interpretative centre.

Where is Castle of Mértola?

Castle of Mértola is in Mértola, on a hilltop above the Guadiana River in the municipality of Mértola. It stands in an urban area on rocky ground bisected by the Guadiana River and the Ribeira de Oeiras. The former Islamic mosque, now the Church of Nossa Senhora da Assunção, is nearby.

What did Castle of Mértola look like in its prime?

In its prime, Castle of Mértola was an irregular rectangular fortress of warm ochre-brown masonry, surrounded by continuous crenellated walls. Its silhouette was dominated by a 30 m rectangular keep with prismatic merlons and machicolations. Square and rectangular towers, a semi-cylindrical tower by the main gate, a barbican and the north-western ‘traitors' gate’ completed the defensive layout.

Is Castle of Mértola still standing, or is it a ruin?

Castle of Mértola is still standing and has been restored. It retains its medieval layout, prominent defensive towers, battlemented walls, keep and covered cistern. The fortress was in semi-ruin and un-garrisoned by 1758, and an earthquake caused damage in 1969, but it now functions as a museum complex.

Can you visit Castle of Mértola?

Yes, Castle of Mértola can be visited as a museum complex. The keep contains an observation deck and an interpretative centre presenting Roman, Visigothic, Christian and Islamic collections. Its heritage designation is National Monument of Portugal.

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