Phare des Grands Cardinaux

Phare des Grands Cardinaux is a solitary lighthouse rising from a rocky shoal southeast of the island of Hœdic, in the Morbihan region of Brittany. Built on the Groguéguez rock, exposed to the full force of the Atlantic, it has spent more than a century warning sailors approaching the Bay of Quiberon.

Where exactly is it located?

The Grands Cardinaux stands on a small, uninhabited outcrop within the Houat-Hœdic archipelago, in open water east of Hœdic. This is not a lighthouse you can walk up to — the site is too exposed and too dangerous for any permanent structure beyond the tower itself. It is, however, clearly visible from the ferry to Hœdic, from the island's beaches, and from several viewpoints along the Morbihan coast, especially on clear days when its silhouette stands out against the horizon.

How do you get a good view of it?

The best starting point is Hœdic itself, reachable by ferry from Quiberon or from the mainland depending on the season and shipping line. From the island's shores — particularly the eastern side — the lighthouse is visible to the naked eye, and binoculars reveal the details of its stone construction. Visitors wanting a closer look can join local boat or sailing trips run by operators in the area, though the lighthouse itself cannot be visited from the inside: it is a fully automated structure with no permanent keeper.

What's the story behind its construction?

The idea of building a lighthouse on the Cardinaux rock dates back to 1868, and the project was formally approved in 1870, though it had to be redesigned by engineer Bourdelles before the final version was accepted in January 1875. Construction itself, carried out in the harsh conditions of open sea, ran from 1875 to 1879, with the work finished in the summer of that year. Remarkably, despite the difficult location, the project turned out to be one of the cheapest offshore lighthouses ever built in France, costing under 170,000 gold francs thanks to being managed directly rather than through contractors.

What does the tower look like?

The lighthouse takes the form of a slightly tapered stone tower, built from smoothly dressed stone blocks. A distinctive architectural feature is the series of corbels linked by flat bands that support the gallery's balustrade — a detail typical of French offshore lighthouses from the second half of the 19th century, combining practical function with a solid, almost fortress-like look.

What has changed in recent years?

The lighthouse underwent a thorough renovation that began in June 2019, including restoration of its facade, and the tower was repainted that same month. Its historical value was formally recognized when it was listed as a monument historique by decree on 10 June 2020, placing the Grands Cardinaux alongside other protected lighthouses along the French coast.

When is the best time to visit?

Spring and summer offer the most stable weather for viewing the lighthouse from the sea, and ferries to Hœdic run more frequently during these months. Days with good visibility and moderate wind give the best contrast between white sea spray breaking against the rocks and the tower's raw stone silhouette. In autumn and winter the area becomes harder to reach due to stormy conditions, though this is precisely when the lighthouse performs its most essential, practical role.

Frequently asked questions

Can you go inside the lighthouse? No — Phare des Grands Cardinaux is a fully automated structure with no permanent keeper, and it is not open for interior visits.

Where is the best place to see it from? From the island of Hœdic, especially its eastern beaches, or from a boat or ferry passing through the Houat-Hœdic archipelago.

Why did construction take so long? The design had to be reworked by engineer Bourdelles after its initial approval in 1870, and the final version wasn't accepted until 1875 — construction on the open sea then took another four years.

Is the lighthouse a protected monument? Yes, it has been listed as a monument historique since 10 June 2020, confirming its architectural and historical significance.