Open Travel Guide
History of Brittany

Brittany History & Heritage Guide 2026

Brittany's past, on the ground: the sites, museums, and eras that explain what you're seeing.

The short answer: start with Carnac Megalith Alignments, Saint-Malo: The Corsair City and Château de Fougères. This guide profiles 8+ historical sites in Brittany, with prices, timing, and the practical notes that decide whether each one earns a place in your plan.

Brittany (Breizh) is France's westernmost peninsula — a Celtic heartland thrust into the Atlantic where granite cliffs, prehistoric megaliths, medieval walled cities, and 2,800 kilometres of coastline combine into one of Europe's most distinctive travel destinations.

Brittany's history is a 6,000-year story of cultural layering: Neolithic megalith builders who left the world's largest concentration of standing stones at Carnac; Bronze Age and Iron Age Celtic peoples who gave the peninsula its distinct character; Roman occupation under the name Armorica; the arrival of Celtic monks and missionaries from Britain (5th–6th centuries AD), who named the peninsula 'Brittany' (Little Britain) and established the first Christian communities; Viking raids and Norse settlements along the north coast; the Duchy of Brittany (939–1532), a sovereign state that at its height rivalled the Kingdom of France; the Treaty of Union with France in 1532; the Wars of Religion; and the long modern story of a region that has preserved its language, festivals, and identity against all pressures of French centralism. Brittany joined France as a nominally equal partner — the Perpetual Union of 1532 — but was progressively absorbed. The Breton language, once spoken by the entire population, was systematically suppressed after the French Revolution. Today approximately 200,000 people speak Breton, a Celtic language closely related to Welsh and Cornish.

Historical timeline

Key moments that shaped Brittany.

  1. 1

    Neolithic megalith builders construct the Carnac alignments, dolmens, and tumuli — the largest prehistoric monument complex in the world

  2. 2

    Celtic Iron Age peoples settle the peninsula; the tribe known as the Veneti dominate Morbihan and build an Atlantic seaborne trading network

  3. 3

    Julius Caesar defeats the Veneti fleet in the Gulf of Morbihan — the first recorded naval battle in Atlantic waters — and brings Armorica under Roman control

  4. 4

    Mass Celtic migration from Britain (fleeing Anglo-Saxon invasion) establishes the 'Breton' population; seven founding saints (Brieuc, Tugdual, Pol, Malo, Samson, Corentin, Patern) give names to Brittany's bishopric cities

  5. 5

    Viking incursions devastate coastal Brittany; the peninsula temporarily loses its identity under Norse occupation

  6. 6

    Duke Alain Barbe-Torte expels the Vikings and establishes the independent Duchy of Brittany

  7. 7

    Breton knights cross the Channel with William the Conqueror and receive major fiefdoms in England

  8. 8

    The War of the Breton Succession — a proxy war between France and England fought across Brittany — ends with the Treaty of Guérande restoring Breton sovereignty

  9. 9

    Battle of Saint-Aubin-du-Cormier: the Duchy's last independent army is crushed by French royal forces

  10. 10

    Duchess Anne of Brittany marries French King Charles VIII — the beginning of Brittany's absorption into France

  11. 11

    Treaty of Union: Brittany formally joined to France, retaining its parliament, laws, and tax privileges

  12. 12

    The Révolte du Papier Timbré — a popular Breton uprising against new royal taxes; brutally suppressed by Louis XIV

  13. 13

    The Chouannerie — royalist and Catholic insurgency against the Revolutionary government, concentrated in eastern Brittany and the Vendée

  14. 14

    The Breton nationalist movement begins; the Gorsedd of Brittany is founded in Guingamp

  15. 15

    Brittany suffers disproportionate casualties in World War I — memorials in every Breton village testify to the region's losses

  16. 16

    German occupation; Saint-Malo is 80% destroyed in August 1944 during its liberation by American forces; Brest is entirely demolished in a 47-day siege

  17. 17

    The first bilingual (French-Breton) Diwan school opens in Finistère — the beginning of the modern Breton language revival

  18. 18

    The Breton fest-noz night festival is inscribed on the UNESCO List of Intangible Cultural Heritage of Humanity

Historical eras

The chapters of Brittany's past.

5000–500 BCE

Neolithic and Bronze Age

800 BCE–400 CE

Celtic and Roman Armorica

400–900 CE

Early Medieval (Celtic Christianity)

939–1532

Duchy of Brittany

1532–1789

Union with France and Royal Brittany

1940–1944

World War II

Historical sites

Places where Brittany's past comes alive.

Museums

Curated collections that tell Brittany's story.

Museum

Musée de Bretagne

Admission: €6/adult (~$6.50); free first Sunday of each month

Museum

Musée des Beaux-Arts de Rennes

Admission: €5/adult (~$5.40); free Sundays

Museum

Musée des Mégalithes de Carnac (Maison des Mégalithes)

Admission: Free (entry to the guided tours is charged separately)

Museum

Musée de la Mer (Musée National de la Marine), Brest

Admission: €8/adult (~$8.70), €5/reduced (~$5.40)

Museum

Musée de la Pêche, Concarneau

Admission: €8/adult (~$8.70), €5/reduced (~$5.40)

Historical tours

Guided experiences that bring history to life.

Tour

Saint-Malo Rampart and Corsair History Walk

1.5–2 hoursFree

Self-guided walk along the 17th-century ramparts of Saint-Malo. The circuit of approximately 3 km includes 11 towers and views over the tidal estuary and offshore islands. A free PDF guide is available at the Saint-Malo tourist office (Esplanade Saint-Vincent, open Mon–Sat 09:00–18:30) or download the Saint-Malo app for guided commentary.

Tour

Guided Carnac Megalith Tour

1.5 hours€6/adult (~$6.50), €4/reduced (~$4.30)

The only way to access the fenced sections of the Carnac alignments (Kermario, Ménec, Kerlescan) is on a guided tour departing from the Maison des Mégalithes. Tours run daily in French and English (Jul–Aug); French only (Apr–Jun, Sep). Duration: 1.5 hours. Booking: Maison des Mégalithes, Route des Alignements, Carnac. Phone: +33 2 97 52 29 81. Online: menhirs-carnac.fr.