Castle of Mourão

Mourão Castle (Castelo de Mourão) is a medieval fortress in the town of Mourão, in the Alentejo region of eastern Portugal, Évora District. It sits close to the Spanish border, and that position shaped its whole story: for centuries it guarded the frontier and was rebuilt again and again.

Where is Mourão Castle?

The castle stands in the centre of Mourão, in the southeast of Portugal, at roughly 38.385° N, 7.347° W. The surrounding landscape is gentle hills, cork oak groves and vineyards, away from the main tourist routes, so it tends to be quiet even in high season.

What is the history of the castle?

Little is known about the earliest settlement on this hill. During the Christian Reconquest the area saw fighting between Muslim and Christian forces, and the settlement was abandoned. After the Portuguese took the region, the lands were given to the Order of the Hospitallers. Their prior, Gonçalo Egas, granted the settlement its first charter (foral) in 1226 to encourage people to settle and help defend it.

The fortress is linked to the reign of Sancho II, and under Dinis I the older stronghold was remodelled and given three towers. Under Manuel I the town received a new charter, which brought another round of works. In the first half of the 16th century the brothers Diogo and Francisco de Arruda, well-known military architects, oversaw the rebuilding. The barbican and the surrounding moat are credited to them.

Why does the castle have bastion-style defences?

After Portugal regained independence in 1640, the border position of Mourão became especially important. The castle was modernised following the ideas of Sébastien de Vauban, with work led by Nicolau de Langres and Pierre de Saint-Colombe. The medieval fortress gained a double ring of walls suited to 17th-century artillery, with pointed ravelins and a roughly star-shaped layout.

What to look for

• Layout and walls. The enclosure is an irregular trapezoid, with towers linked by a wall-walk (adarve).
• Main gate. Two square towers protect it, typical of Gothic military design.
• Wall material. The medieval walls combine three stones: schist, marble and granite, giving a distinctive mottled texture.
• Moat and bastions. The remains of the early modern defences show how the art of fortification changed over time.

Frequently asked questions

Which region is Mourão Castle in? Alentejo, in Évora District, near the Spanish border.

Who rebuilt the castle? Among others, Dinis I's builders, the Arruda brothers in the 16th century, and engineers working to Vauban's principles in the 17th.

What are the walls made of? Schist, marble and granite.

Why was it so important? Mourão lay on the frontier, and after 1640 defending the border called for modern fortifications.

Mourão Castle is a rewarding stop for anyone interested in military history and the Portuguese-Spanish borderlands, especially on a trip through the Alentejo.