Fortress of Saint James of Sesimbra

The Fortress of Saint James of Sesimbra (Fortaleza de Santiago) is a 17th-century coastal stronghold in the fishing town of Sesimbra, in Portugal's Setúbal District, roughly 40 km south of Lisbon. It has guarded the fishing harbour for centuries and is now one of the town's best-known landmarks, home to the Maritime Museum of Sesimbra.

When and why was it built?

The fortress went up between 1642 and 1648 on the site of an earlier 16th-century Manueline fort commissioned by King Manuel I. The new structure was meant to shield the fishing harbour from pirates and from Spanish attacks, at a time when Portugal was fighting to keep its restored independence. King John IV entrusted the works to João de Cosmander, a Dutch Jesuit and military engineer.

What does it look like?

The layout follows a star shape, a standard solution in the defensive architecture of the period: projecting bastions let defenders cover the approaches from several angles. Inside the walls stood the governor's residence, barracks for the garrison, water cisterns, a storehouse and a chapel dedicated to Saint James (Santiago), which gave the fortress its name.

What can you see today?

After a careful restoration that kept as much of the original structure as possible, the fortress reopened to the public in July 2014. Visitors can work out what each space was used for, from the ammunition store to the barracks and the governor's house.

In 2016 the Maritime Museum of Sesimbra (Museu Marítimo de Sesimbra) moved into the building. Its displays cover the history of the sea, fishing and the local fishing community, from the earliest times to the present day. The fortress also hosts exhibitions, concerts, receptions and conferences, so it works as a cultural venue as well as a monument.

Why visit?

The walls open onto views of the beach, the rooftops of the town and the sheltered harbour. It is a good spot to grasp why Sesimbra has always lived from the sea, and why it also had to defend itself against what came across it. The fortress stands in the parish of Santiago, close to the waterfront, so a visit combines easily with a stroll around the harbour and the beach.

Frequently asked questions

When was the Fortress of Saint James built? Between 1642 and 1648, on the site of an earlier 16th-century fort.

Who supervised the construction? João de Cosmander, a Dutch Jesuit military engineer, appointed by King John IV.

What is inside today? The Maritime Museum of Sesimbra, opened in 2016, plus space for cultural events.

When did it reopen after restoration? In July 2014.

Where is it? In the parish of Santiago in Sesimbra, Setúbal District, Portugal.