Visit the Musée de la Mer and the Fort Royal, located on the largest of the Lérins islands!
This place is entirely dedicated to the sea and the island's history.
A museographic and historical tour featuring the cell of the man in the Iron Mask.

Rendezvous at the port of Cannes with the Horizon shipping company for a 20-minute sea crossing!
When you arrive on the island, discover the Royal fort on the side of the cliff. Inside this fort, you will find the Sea Museum.
Relive the history of the island by entering the cell of the man with the "Iron Mask". Visit the other part of the museum dedicated to underwater archaeology.
Don't miss the view of the coastline and the Southern Alps.
For an unusual experience, spend a night in the royal fort. 

Musée de la mer, Iron Mask Museum and Fort Royal

Located in Fort Royal, visit the Historical Museum. From the sea, you will appreciate the remarkable integration of the ramparts with the rocky cliff.

The exploration of the sea museum starts on the first floor with the Roman remains. You discover the wrecks dating from the first century BC and the tenth century. Thanks to the archaeological excavations carried out on the island, wrecks and wall paintings were discovered.

Sainte Marguerite Island and the Fort Royal Museum of the Sea

Excursion to Sainte Marguerite Island with Compagnie Horizon

Model of underwater wrecks

In the 1970s, Roman underwater wrecks were found on the island of Sainte Marguerite. The two best known wrecks are those of the 10th century ships La Tradelière and Le Batéguier. The ship's cargo can be discovered in the museum: amphorae, crockery, ceramics, vases, oil lamps... Discover the ship models and reconstructions.

Roman remains

In the 1970s, work in the fort's enclosure brought to light important Roman remains. Archaeological excavations carried out since the 6th century BC revealed the existence of dwellings dating back to antiquity. In the 1990s, fragments of wall paintings from the Roman baths were discovered.
All these ancient finds are now on display in the museum on the first floor.

The works of the prisoner Jean Le Gac

Jean Le Gac painted several works on the theme of prisoners in the 1990s.
This volunteer prisoner aimed to illustrate the memories of the prisoners.
One can discover the rebellions against the Reformed Church and the Arab revolts.
A series of four paintings called "the prisoner painter". All of them are painted on the walls of the prison cells.
Each work tells the story of the hardship felt by the prisoners during certain events of the time.

The iron mask cell

A prisoner whose identity is still mysterious.
This enigma has been popularized by novelists and historians of France. He was given several identities, including that of Louis XIV's twin, the version popularized by Hollywood films.
This prisoner was locked up for 34 years, including 11 years on the island of Lérins. The man hid his face with a mask and the reason for his imprisonment was unknown.
His life ended at the Bastille fortress in Paris where he was buried. Following his death, his mask and personal effects were burned.
Only the guard knew his identity.

Sleeping on site, an unusual experience!

During the school holidays, the Centre International de Séjour des Îles de Lérins offers you to sleep in the royal fort!

Atypical location allows you to enjoy the island to the fullest.

Dormitory-style accommodation with bunk beds, outdoor dining areas, and a kitchen with menus.

To book, please click on this link.

History of the Fort and the prison

On the edge of the island's cliff, stands the Fort Royal.
This building was built to lock the access to Cannes at the beginning of the 17th century at the request of the Duke of Guise.
Built on the Roman remains, the Fort was reinforced a few years later by the Spanish during their occupation of the island.
The French quickly took possession of the island and gave the citadel the name of Fort Royal.
At the end of the 17th century, the fort became a state prison and was further enlarged. Famous prisoners made its reputation, including the unknown Iron Mask.

During your visit to the fort, you will discover :

The bastions, this military fortification.
The chapel and the bell tower offer a panoramic view of the fort.
The water wells to make the island habitable.

did you know that
Discover the new Museum of the Sea on the island of Sainte Marguerite located underwater: The Eco Museum

Opening hours - Prices - Information

Museum timetable

April to May
Open every day except Monday
10:30 to 13:15 - 14:15 to 17:45

June to September
Open every day
from 10am to 5.45pm

October to March
Open every day except Monday
10:30 to 13:15 - 14:15 to 16:45

1 and 11 November, 25 December, 1 January, 1 May.
Last admission, 30 minutes before the museum closes.

Prices of the Museum of the Sea

The ticket includes a visit to the fort and the museum.

Adult: 6 €
Adolescents from 18 to 25 years old: 3 €
Children under 18 years old: free
Groups of 10 people or more: 3 €

November to March:

FREE ENTRY every 1st Sunday.

from October to May :

ENTRY to the Fort Royal at 3€ (Museum of the Sea closed) every Monday.

Remember to book your museum tickets online for a quick and smooth purchase.


Not suitable for disabled people with PRM and pushchairs.

Discounts on your maritime tickets

Shipping Compagnie Horizon book online 10% discount.

Where can I park my car in the port of Cannes?

Take the boat from the port of Cannes at Quai Laubeuf with the Compagnie Horizon We recommend 3 car parks:

Parking Laubeuf - on site
Parking de forville - 10 minutes walk
Parking du Casino - 10 minutes walk