Castles in Portugal
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Castles in Portugal were crucial components of the military across history. The Portuguese learned the art of fortification construction from the Romans and the Moors. The Romans, who ruled and colonized the territory of current-day Portugal for more than four centuries, built forts with high walls and strong towers to defend their populations. The Moors, who invaded the Iberian Peninsula in the year 711, brought new stonework and heavily fortified gates to the peninsula.
As a place, Portugal has well-defined geographic boundaries, with the Atlantic Ocean to the south and the west, and rivers and mountains to the east and north. It occupies the westernmost portion of the Iberian Peninsula, and is about the size of the American state of Indiana. The country is a place of topographical contrasts as well, making its defense difficult. The areas around Porto in the north are hilly and green, with fertile river valleys and a rocky coast. The green mountains turn less fertile as they spread to the east, and become mountainous towards the south to the Beiras. Along the coastal Beiras, the topography becomes hillier, with pine forests and a sandy coast. In the central region, the area around the capital of Lisbon, is known for its white rocks, olive fields, and open spaces, while the Tagus basin divides the nation in half, with the yellow hills and cattle fields of the central region on the north bank and the beginnings of the Alentejo to the south. The Alentejo is a vast golden plain that extends south to the red cliffs and green hills of the Algarve, an area markedly influenced by its affinity with Africa, as much as Europe.
These conditions made the defense of Portugal difficult, and the region was marked by eras of fortification building. The Romans were the first to bring in organized military outposts in order to guard their domains. These outposts were usually built on existing fortified castros or defensible Neolithic/Paleolithic strongholds in the hills. But, the Romans gradually built their centres based on their trade and/or commercial needs, and abandoned many sites for places along rivers or lowland agricultural settlements. The outposts that remained continued to serve as sentries or outposts, while some points evolved into larger towns or cities that survived long after the Romans had retreated.
There were primarily two main periods of fortified castle construction: those built and defended by the Moors from Northern Africa, between the 8th and 13th centuries, and those built or maintained by Christian forces, including the Kingdom of Portugal, after this period.
The Moors, Islamic peoples who had arrived in the Iberian Peninsula from Northern Africa around 711 conquering the Christian lands ruled by the Germanic Kingdoms of the peninsula, built strong castles and fortifications in many cities. But, although many Portuguese medieval castles originated in the Islamic period, most of them were extensively remodelled after the Christian reconquest. One of the best-preserved is the Castle of Silves, in the ancient capital of the Al-Garb (today's Algarve). Built between the 8th and 13th centuries, the castle retains its walls and square-shaped towers from the Moorish period (including its 11th-century cisterns or water reservoirs). The old Moorish centre of the city, the Almedina, was defended by a wall and several fortified towers and gates, parts of which are still preserved.
Another example of Islamic castles in the Algarve is the Castle of Paderne, whose ruined walls evidence the taipa building technique used in some period construction. The Castle of the Moors, in Sintra (near Lisbon), has also preserved remains of its walls and a cistern from the Moorish occupation. Similarly, many of modern Portuguese towns and cities still retain examples of Moorish city walls that have been preserved or reused locally, such as in the Cerca Velha of Lisbon or the fortifications of Évora. Many of these walls were marked by the characteristic horseshoe-shaped gates leading into their courtyards, as evidenced from the castles in Faro and Elvas.
During the Portuguese Reconquista (12th and 13th centuries) many of the castles were reused or rebuilt to protect their fledgling kingdom from invasions from both Moors and rival Christians, like the Castilians. King Afonso Henriques sponsored the building of many fortifications (often remodelling Moorish castles) such as the Castle of São Jorge (in Lisbon) and granted land to Military Orders (specially the Templar Knights and the Knights Hospitallers) in order maintain order and defend their border outposts. The Templar Knights built several fortresses along the line of the Tagus river, like the castles of Pombal, Tomar, Belver and Almourol. They are credited as having introduced the keep to Portuguese military architecture. In addition to supporting national integrity, the castle was used to defend many of the settlements and towns in the hinterland, and promote the possession of crown.
By the Middle Ages, Portugal was a crossroads of cultures, with hostile Moors to the south and rival Iberian kingdoms to the east. Unlike many of their European counterparts, Portuguese castles were heavily influenced by the master-builders of Rome and Northern Africa. Even the early Celtic tribes of Portugal, the early Lusitanians, already fortified their villages within simple stones walls by this time. The Romans, who occupied Portugal after this period, for the next 400 years, then built forts with high walls and strong towers to defend their towns. The Moors, who invaded the Iberian Peninsula in 711 A.D., brought innovative stonework and heavily fortified gates to Portugal. Meanwhile, Northern European and English forts/castles built wooden forts during this period.
Around the 12th century, Portugal emerged as a nation and, lead by the nobleman Afonso Henriques, launched a bold crusade to carve the southwestern half of the Iberian Peninsula away from the Moors. Many of Portugal's earliest castles from this post-1139 A.D. period were reconstructions of Moorish and Roman forts. Their ogival style has certain common themes: high simple granite walls, a dual towered gatehouse, a cistern and pointed castellated walls.
With the Gothic period, the castles became more and more flamboyant and deadly, with archers’ loops in the castellated walls, oil spouts at the base of parapets, and increasingly higher keeps and towers.
By 1249 the Moors had been expelled from southern Portugal, and the nation became the first in Europe to take on its modern borders. The focus of Portuguese castles during this period shifted from lines along east to west flowing rivers, to the towns along the long Portuguese border with rival Castile. The pinnacles of this period were the 13th-century castles built under King Denis, who rebuilt almost every major castle in the land. Until Denis, Portugal’s castles were usually just a three-story keep with one or two rings of walls. Now, new tower keeps were built, like the one at Beja or the five-sided keep at Sabugal. Many castles were encircled by multiple layers of walls, many with staggered gates and hidden escape doors. The wooden buildings used by the garrisons were built with more room for provisions and space for soldiers.
The 13th and 14th centuries was a period a flamboyant castle building, with more decorative touches and features, like pepper pots on towers, ornate brickwork and massive great halls built of stone. Many of these castles became fortified palaces to protect the monarch and courts.
But, just as castle building reached its zenith, the era came to quick end in 1453: in Byzantium, the Turks brought down the once impregnable walls of the castle with cannon fire. The age of castles was over. But, the age of great forts had just begun. Gone were high walls, proud keeps and strong towers. Now, low stonewalls were built around mounds of earth to repulse cannonballs. The straight lines of walls were replaced by star-like angles to allow for cannon and gunfire to be crossed with deadly results against the enemy. These forts became more and more sophisticated in the 16th and 17th centuries. Portuguese engineers built hundreds of impressive forts to defend the empire. Many are still found across South America, Africa, and Asia. The finest examples in Portugal may be found in Almeida, Valença do Minho, Marvão, and Elvas. These gun forts were in use up to the 1830s Civil War, the last war to be fought on Portuguese soil, and some had military uses into the 20th century.
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- List of castles in Portugal
- Portuguese architecture
- Military history of Portugal
- History of Portugal