Silves Castle is the monument by which the town is first recognised, as its red-sandstone walls are seen from far across the Arade valley. The fortress encloses the alcáçova, the upper citadel of the medieval city, and is held to be the most complete example of Almohad military architecture surviving in Portugal.
The walls were raised from grés de Silves, the local red sandstone, combined with taipa — a rammed mixture of clay, gravel and sand that hardened almost to stone. Eleven square towers punctuate the ramparts, which are walked today along a continuous path. Within the enclosure, the excavated remains of an Almohad palace are seen, the only Islamic palace identified in the country, together with two great cisterns.
The Cisterna da Moura, the larger of the two, supplied water to Silves into the early twentieth century, while the deep shaft of the Cisterna dos Cães is thought to reuse an earlier mine. From the highest points of the wall, the cathedral, the old town and the surrounding orange groves are taken in at a glance, which is why the castle is treated as the natural starting point of any visit to Silves.
Highlights
- The most complete Moorish fortress in Portugal
- Red-sandstone walls reinforced by eleven square towers
- Excavated remains of the only known Islamic palace in the country
- The vast Cisterna da Moura, in use until the twentieth century
- Continuous rampart walk with views over the old town and the Arade valley
History & context
A fortified hilltop existed at Silves in Roman times, but the castle as it stands was shaped under Islamic rule, when the city served as the political and cultural capital of the Algarve. Its walls and towers belong mainly to the Almoravid and Almohad periods of the eleventh and twelfth centuries. In 1189 the fortress was taken by King Sancho I with the help of Northern European crusaders, then soon recovered by Muslim forces, before its definitive conquest in 1249 under King Afonso III. After the silting of the Arade reduced the city's importance, the castle declined, and it was later classified as a National Monument.
🗓️ Best time to visit
Spring and autumn, when the hilltop is comfortable and the orange groves below are green. Early morning is the coolest and quietest part of the day in summer.
⏱️ Duration
60–90 minutes
♿ Accessibility
Limited. The site is reached by a slope up through the old town, and the rampart walk involves stone stairs and uneven ground unsuitable for wheelchairs.
Frequently asked questions
How much does it cost to visit Silves Castle?
A standard ticket is priced at around 2.80 euros, with reductions for children and seniors. A combined ticket with the Archaeology Museum is also sold.
How long does a visit to the castle take?
Most visitors spend between one hour and ninety minutes walking the ramparts and seeing the cisterns and the palace excavations.
Is Silves Castle suitable for children?
Yes, although the rampart walk has unguarded edges and uneven surfaces in places, so children should be kept close.