Castle of Almada: A Fortified Stronghold on the Tagus
Site at a Glance
- Rating
- 3
- Popularity
- Very Low
- Country
- Portugal
- Primary era
- Early Modern
- External website
- Open
- Eras represented
- Medieval, Early Modern
- Civilizations
- Portuguese
- Site type
- Military
- Remains
- Castle
On this page11 sections
History
Castle of Almada is a medieval fortified complex in Portugal, whose castle construction began in 1195 under Portuguese Christian rule after the capture and reconquest of Almada. It occupies a strategic position on the southern bank of the Tagus and developed through successive phases of Muslim, medieval Portuguese, early modern, and modern military history.
Muslim Almada and the Portuguese conquest
During the Muslim occupation of the Iberian Peninsula, the settlement was known as al-Madan, a name interpreted as “gold mine” or “silver mine” and possibly connected with mineral extraction in the area. The settlement appears in the twelfth-century geographical work of Muhammad al-Idrisi.
Almada was captured during the Portuguese conquest of Lisbon around 1147, when King Afonso and a crusader army took control of the settlement. Its defenses were reinforced and enlarged under a foral, a medieval charter defining a community’s rights, duties, privileges, and administration, issued in 1170. King Sancho I granted Almada a new charter in 1190.
Almohad destruction and Christian consolidation
In 1191, Almohad forces under Caliph Abū Yūssuf Yaʿqūb bin Yūssuf al-Manṣūr destroyed Almada’s defensive lines. The Almohads were a North African Muslim dynasty that ruled parts of the Maghreb and Iberia during the twelfth and thirteenth centuries. Their northward advance from the Algarve had already forced Portuguese forces out of Alcácer do Sal and Palmela.
Portugal recovered the fortifications in 1195 and began constructing a castle on the site. Christian control of the territory between the Tagus and Évora was consolidated after the Battle of Las Navas de Tolosa in 1212, a major victory over the Almohads in the medieval Christian conquest known as the Portuguese Reconquista.
On 24 February 1255, King Afonso III reconfirmed the Order of Santiago’s control of Almada and several other castles. The Order of Santiago was a Christian military-religious institution that held land and defended frontier territories during the Reconquista. The confirmation was addressed to its master, Paio Peres Correia, and the order’s commander, following earlier donations by Sancho I and confirmation by Afonso II.
Medieval and early modern fortification
The castle was expanded and strengthened during the reign of King Denis and again under King Ferdinand. During the succession crisis of 1383–1385, forces loyal to Castile encircled Almada in 1384. Constable Nuno Álvares Pereira failed to relieve the region, leaving the castle involved in the wider struggle over the Portuguese crown.
During the reign of King Manuel I, a tower was added to the southern wall. The old castle was rebuilt during the Portuguese Restoration War under King Afonso VI. This seventeenth-century conflict restored Portugal’s independence from the Spanish Habsburg monarchy. The rebuilding also introduced a line of bastions, projecting defensive platforms that strengthened the castle’s military system.
Earthquake, civil war, and changing military use
The Lisbon earthquake of 1 November 1755 damaged the castle. Reconstruction around 1760 gave the complex its present extent and layout. The castle was decommissioned in 1825, when Lieutenant Fulgêncio Gomes dos Santos Vale was ordered to remove its arms and transfer them to the military arsenal in Lisbon.
The fortification was regarrisoned in 1831 during the Portuguese Civil War, fought from 1828 to 1834 between Miguelist absolutists and constitutional Liberals. Colonel Manuel de Freitas e Paiva commanded the garrison. King Miguel visited on 18 February 1832. After Liberal forces defeated the Miguelists at the Battle of Cova da Piedade, also called the Battle of Cacilhas, on 23 June 1833, the defeated troops withdrew to the Castle of Almada and were defeated there the following day.
Repairs in 1865–1866 coordinated the castle with defensive batteries along the southern bank of the Tagus. As its defensive importance declined, the garrison was reduced and command was assigned to reformist officials. The castle was classified as a first- and second-class fort. A public garden opened in 1868, adding a civic use to the military complex.
Republican and contemporary history
When the Portuguese Republic was proclaimed on 5 October 1910, Republicans occupied the castle without resistance. During the 1918 pandemic, the site was used as a temporary hospital.
After the revolt of 26 August 1931, the revolutionary aviator José Manuel Sarmento de Beires attempted to bomb the fortification. The bomb struck the town square instead, killing three people and injuring numerous onlookers, including children. Sarmento de Beires had earlier flown with António Jacinto de Silva Brito Paes on the first aerial journey from Lisbon to Macau, completed on 2 April 1924.
The castle received new artillery during the Second World War and remained garrisoned until the Carnation Revolution, the military-led revolution of 25 April 1974 that overthrew Portugal’s authoritarian regime. The garrison revolted during the revolution. After 1976, the buildings were renovated for use by the Portuguese National Republican Guard, a nationwide security and gendarmerie force with military organization. The garden was refurbished during the 1990s as part of the municipal restoration of Almada Velha’s historic centre. By the early twenty-first century, the castle and its fortifications accommodated a contingent of the Setúbal Intervention Detachment of the National Republican Guard.
Remains
The surviving complex is a stone-built medieval castle and fortified enclosure incorporating granite, iron, and wood. Its present scale and arrangement derive from the reconstruction around 1760, while earlier medieval and early modern defenses remain part of the layered structure. The walls, tower, battlements, bastions, batteries, and public garden together express the site’s transformation from a medieval stronghold into a later artillery fortification and institutional complex.
Walls and defensive structures
Southern wall tower
A tower built during the reign of Manuel I rises from the southern wall. It forms part of the castle’s stone defensive fabric, which also includes battlements. The tower belongs to the phase when the medieval fortification was being strengthened under the Portuguese monarchy and remains integrated into the later extent of the complex.
Bastions and batteries
The later defensive system includes a line of bastions, projecting platforms designed to support the castle’s artillery defenses. These works were coordinated with defensive batteries positioned along the southern margin of the Tagus. Their relationship reflects the expansion of the castle’s defenses beyond the medieval wall line and its continued military adaptation after the reconstruction of around 1760.
Garden and later institutional fabric
A public garden forms part of the castle complex and provides views across the Tagus. Opened in 1868 and refurbished during the 1990s, it represents the site’s civic adaptation after its principal defensive role had diminished. The buildings and fortifications were later adapted for institutional and military use, including occupation by the Portuguese National Republican Guard.
