Alcácer do Sal Castle

Alcácer do Sal Castle

A castle above the salt

In the south of Portugal, where the river Sado winds slowly through wide marshes and rice fields toward the sea, the white town of Alcácer do Sal stretches along the riverbank. Above it, on a long hill, sits the castle, looking down over the water and over the glittering salt pans that have made the town's fortune for thousands of years. The town's very name tells its story: Alcácer comes from the Arabic word for "castle" or "fortress", and do Sal means "of the salt".

One of the oldest forts in Iberia

The hilltop of Alcácer do Sal has been fortified for an astonishingly long time — it is one of the oldest fortified sites in the whole Iberian Peninsula. Ancient peoples, Phoenician and Carthaginian traders, and then the Romans all valued this spot, where the navigable river met the rich salt flats and the routes inland. The Romans built an important town here and shipped its salt, fish and farm produce far across their empire.

A Moorish stronghold

When Muslims ruled the south of Portugal, Alcácer do Sal became a strong and prosperous town, protected by a powerful citadel. Its position on the river made it a valuable port, linking the inland country with the sea and with trade across the Mediterranean. The Moors greatly strengthened the castle, and its walls and towers controlled the river and the salt trade that flowed through the town.

A hard-won conquest

Because it was so strong and so important, Alcácer do Sal was fiercely fought over during the Reconquest. Christian armies captured it more than once, only to lose it again to Muslim counter-attacks. The decisive moment came in 1217, when a Portuguese force, helped by passing crusaders and the military orders, took the town for good after a long and difficult siege.

After the conquest the castle was rebuilt, and a monastery of the Order of Santiago — the warrior monks who had helped win the town — grew up within its walls. For centuries the fortress guarded the river and the salt that remained the lifeblood of the region.

A castle reborn as an inn

In time the castle lost its military role, and parts of it fell into ruin. But the old monastery within the walls has been carefully restored and turned into a historic inn, so that guests can now stay within the ancient citadel and enjoy the sweeping views. Archaeologists working at the site have uncovered remains from many ages, layered one upon another, and some of these can be seen in a small museum within the castle.

Visiting today

Visitors who climb to Alcácer do Sal Castle can explore the walls and the restored monastery, peer at the layers of Roman, Moorish and medieval history uncovered on the hill, and look out over the river Sado, the white town and the shining salt pans. Ancient beyond easy counting and still watching over its salt and its river, Alcácer do Sal is a fitting place to end a journey through the castles of Portugal.