Citadel of Cascais

A seaside fortress, now a hotel

This point sits at the Citadel of Cascais, a fortified complex on the coast at Cascais that now holds a hotel and an art district.
Last reviewed 4 October 2026 · A four-minute read · 2870 BC–2014
The short answer

The Citadel of Cascais began as a medieval tower raised on Point of Salmodo in 1488 under King John II, built to guard the mouth of the Tagus River against pirates and English raiders. An Italian engineer folded it into a triangular fort in 1594; the complex later became a royal palace, then in 2012 a hotel.

Marine, Cascais, Portugal
Marine, Cascais, Portugal — 2008 · Pedro Ribeiro Simões from Lisboa, Portugal · CC BY 2.0
1410 to 1594

A tower raised to guard the approach to Lisbon

The Citadel of Cascais is a fortress complex on Portugal's coast, now a hotel called Citadel of Cascais. It guarded the mouth of the Tagus River, the water route into Lisbon. A first fort stood here between 1410 and 1415, built because English raiders kept threatening Cascais Bay. In 1488, King John II of Portugal ordered something sturdier. King John II had a medieval tower built at the tip of a rocky point called Salmodo. It was named the Torre de Santo António de Cascais, and it worked alongside two other forts, the Belém Tower and a fort across the river, to defend Lisbon from attack by sea.

The tower stood alone for a century. Then Portugal's crown passed to Spain, and in 1580 Spanish troops under the Duke of Alba took Cascais. The Spanish troops beheaded four Portuguese soldiers and hung the bodies from the fort to frighten the townspeople. Spain's king, Philip I, later ordered the site strengthened. In 1594, an Italian military engineer known as Captain Fratino designed a triangular fort around the old tower, folding it into a new structure called the Forte de Nossa Senhora da Luz de Cascais. The triangle gave the fort three bastions, with the old tower as one of them. Inside, a courtyard connected the bastions to barracks, gun batteries and water cisterns cut into the rock.

1648 to 1755

An earthquake tore the old tower apart

Portugal broke free of Spain in 1640, and King John IV of Portugal had the citadel reinforced around 1648. Builders enlarged the walls and strengthened the defenses facing the sea. The fort held this shape for over a century. Then, on November 1, 1755, a massive earthquake struck Lisbon and shook the whole coast. The upper part of the old tower collapsed, along with its floors and ceilings. The Chapel of Saint Anthony inside the walls was destroyed. Repairs dragged on for years afterward, patching a fortress that had stood for nearly three centuries.

1862 to 1908

A king turned the fortress into a summer palace

In 1862, a nobleman named Joaquim António Velez Barreiros built a modern summer home in Cascais. Joaquim António Velez Barreiros's house helped turn the sleepy fishing town into a fashionable resort. King Luís I of Portugal took notice. In 1870, he had the citadel converted into a royal summer residence. The royal family spent every September and October there for the next thirty-eight years, and Lisbon's wealthy families followed them to Cascais for the summer season. In 1878, Luís had the citadel wired for electric light, the first in the country. A plaque in town still marks Cascais as the place Portugal switched on its first electric lights.

The king's son, Carlos I of Portugal, used part of the fortress as a marine biology laboratory, and a statue of him today looks out at the sea he studied. The royal summers ended abruptly. Carlos I was assassinated in 1908, and the monarchy collapsed two years later.

1910 to 1974

Presidents and prisoners occupied the old citadel

Portugal became a republic in 1910, and the citadel's palace passed to the presidency. President Óscar Carmona lived there through nearly his entire time in office. Decades later, President João do Canto e Castro's wife, Mariana do Canto e Castro, moved into the palace for a few months in 1919, staying from May to September while her husband battled a heart condition. The couple lived in isolation by then. Canto e Castro's crackdown on monarchist uprisings during his presidency had cost him old friendships, and few of his former circle forgave him.

Later in the century, during the Estado Novo dictatorship under António de Oliveira Salazar, the citadel held political prisoners inside its old walls.

The dictatorship fell in the Carnation Revolution of 1974, and the citadel's military role ended with it.

2004 to 2012

The palace reopened as an art space, then a hotel

The Palácio da Cidadela sat mostly closed for decades afterward. In 2004, it reopened as an art space with museums, shops and restaurants. The architect Pedro Vaz led a deeper renovation, and the palace opened fully to the public in November 2011 for the first time in its history. The following year, the Pestana hotel group turned the old barracks and bastions into a luxury hotel. Architects Gonçalo Byrne and David Sinclair designed the conversion, and Portugal's president opened it in April 2012. The renovation took 608 days, a number the hotel now marks with 608 swallows decorating its lounge.

2014 to now

An art district opened inside the fortress walls

In March 2014, the hotel launched the Cidadela Art District, with open studios and galleries built into the fortress walls. It was the first hotel in Europe to run its own art district alongside guest rooms. The triangular fort now holds painters at work. The old tower King John II raised still stands at the point, folded into a building where visitors come to sleep, eat and look at art.

The citadel still serves as the Portuguese president's official summer residence when the hotel is not using the space.

The old tower and bastions now enclose a hotel courtyard where guests can walk the same walls raiders and princes once fought over.

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Where this is

38.697°N 9.421°W TILE ≈ 1.2 × 0.6 KM
Place
Citadel of Cascais
Town
Cascais
Country
Portugal
Tile
≈1.2 × 0.6 km (geohash6)
Standing here
The flight of ICARUS
Last reviewed
4 October 2026

The layers, in order

Sourced records, high and medium confidence. Era background is marked as such.
Prehistoric
2870–2475 BC
Radiocarbon samples from a dig about 745 meters off date human occupation here to between roughly 3000 and 2475 BC.
Stone Age to Iron Age
The Caves of Poço Velho, about 740 meters away, were used as a necropolis from the Paleolithic era through the Bronze and Iron Ages.
Ancient
Roman period
The Roman villa of Alto da Cidreira, about 3 kilometers away, was occupied from around 100 BC into the Roman period.
Wikipedia / Wikidata · record, medium
Medieval
1364–1370
A charter from King Ferdinand in 1370 granted Cascais to Gomes Lourenço de Avelar and released the town from being ruled as part of Sintra.
1488
King John II had a medieval-style tower raised at the tip of Point of Salmodo to help guard the approach to Lisbon against pirates and English raiders.
Early modern
1575–1625
A Portuguese carrack returning from India with spices, Chinese ceramics and slave-trade currency sank off Cascais between 1575 and 1625, found again in 2018.
CNN / SCMP · record, high
1580
In 1580, invading Spanish troops under the Duke of Alba beheaded four Portuguese soldiers and hung them from the citadel to terrorize the town.
Cascais Portugal Tourism · record, medium
1594
In 1594, under Philip I, Captain Fratino designed the Fortress of Our Lady of Light with an unusual triangular layout built around the existing tower.
GPSMyCity · record, medium
1606
The ship Nossa Senhora dos Mártires sank in 1606 off Cascais near the Tagus mouth, loaded with pepper and other goods; it was excavated in 1994.
1 November 1755
The Great Lisbon Earthquake of 1 November 1755 collapsed the upper floors and ceilings of the old tower and destroyed the citadel's chapel.
Modern
1878
In 1878 Cascais became the first town in Portugal with electricity, and the citadel was where it was first switched on.
Cascais Portugal Tourism · record, medium
1889
After turning the fortress into a royal summer palace from 1870, King Luís I died here in 1889.
mid-20th century
During the mid-20th century Estado Novo regime of António de Oliveira Salazar, the citadel was used as a prison for political prisoners.
Lisbon VIP · record, medium
2012–2014
In 2012 the Pestana group turned the former royal palace into a hotel, and by 2014 added the Cidadela Art District with open artist studios and galleries.

Questions about this place

Answered in one sentence, then in full above
What was here before the hotel at the Citadel of Cascais?
A first fort stood on this ground between 1410 and 1415, replaced in 1488 by a medieval tower that King John II ordered built at the tip of Point of Salmodo to guard the mouth of the Tagus River.
What happened at the Citadel of Cascais in 1580?
Spanish troops under the Duke of Alba took Cascais and beheaded four Portuguese soldiers, hanging their bodies from the fort to frighten the townspeople.
When did the Citadel of Cascais become a hotel?
The Pestana hotel group converted the old barracks and bastions into a luxury hotel, which Portugal's president opened in April 2012 after a renovation lasting 608 days.
Did a king ever live at the Citadel of Cascais?
King Luís I of Portugal had the citadel converted into a royal summer residence in 1870, and the royal family spent every September and October there until his death there in 1889.
Was the Citadel of Cascais ever used as a prison?
During the mid-20th century Estado Novo dictatorship under António de Oliveira Salazar, the citadel held political prisoners inside its old walls.
What is the art district at the Citadel of Cascais?
Launched in March 2014, the Cidadela Art District offers open studios and galleries built into the fortress walls, making it the first hotel in Europe to run its own art district alongside guest rooms.

Where this came from

1
Cascais Portugal Tourism — Spanish troops beheaded four soldiers and hung them from the fort
2
Wikipedia, Citadel of Cascais — The 1755 earthquake tore the tower apart under your feet
3
GPSMyCity — An Italian engineer designed the triangular fortress around that older tower
4
Wikipedia, Citadel of Cascais / cast — King Luís I of Portugal died at this citadel in 1889
5
Lisbon VIP — The citadel held political prisoners under Salazar's dictatorship
6
CNN / SCMP — A spice-laden carrack from India sank just offshore, around 1600
7
Academia.edu, The Pepper Wreck — The 'Pepper Wreck' went down nearby carrying a fortune in spice
8
Wikipedia, Caves of Poço Velho — Burial caves near the town center go back to the Stone Age
9
OpenContext / p3k14c radiocarbon dataset — Human activity carbon-dated to nearly 3000 BC a few streets away
10
Wikipedia, Cascais (Portuguese) — Cascais became its own municipality in 1364, freed from Sintra
11
Wikipedia / Wikidata — A Roman villa stood a couple of miles along the coast

Dug nearby

The wave that drowned All Saints' Day
Chalet Ficalho, Cascais
0 m
A 19th-century summer house, now a small hotel
Chalet Ficalho, Cascais
0 m
A 19th-century summer villa, now a hotel
Chalet Ficalho, Cascais
0 m
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