Lanleff: Temple, Leff Valley and Culture

Lanleff offers several concrete starting points for planning your trip: the ruins of the Rotonde dite Temple de Lanleff, a route through the wooded Leff Valley, and cultural and plant events held on specific dates. If you are looking for a hotel in Lanleff, start by deciding what brings you here: would you mainly like to explore historic architecture, choose a scenic route, or plan your stay around a specific program? This distinction can also help you match your travel dates with your chosen focus.

The Temple de Lanleff and its architecture

The ruins of the Rotonde dite Temple de Lanleff were classified as a historic monument in 1889. The Temple de Lanleff has two concentric enclosures in the early Romanesque style; its inner rotunda has twelve arches. Concentric means enclosures that share a common center. For an architectural classification, the number and style should be considered separately: the twelve arches belong to the inner rotunda, while the early Romanesque classification applies to both enclosures. The Temple is possibly the oldest still-visible structure from the High Middle Ages in Côtes-d’Armor, perhaps even in Brittany. The year 1889 refers to the classification of the ruins; the possible dating to the High Middle Ages, by contrast, concerns the building itself.

The Fontaine du Temple also has a specific connection: it feeds a washhouse, or lavoir. The fountain and washhouse thus add another distinct connection to the architectural themes surrounding the Rotonde.

The Leff Valley and route choices

The Circuit du Temple de Lanleff passes through the wooded Leff Valley. The GR®P Trégor Goëlo lets you experience the Temple along its route. These two route connections offer different focuses: the Circuit highlights the valley, while the GR®P features the Temple as a landmark along the way. Choosing according to your interests can help you decide whether the landscape or the historic building should shape your route. The first route passes through the wooded valley; the second connects the trail with the Temple.

The plant market and cultural program

The Marché aux Plantes de Lanleff held its ninth edition in 2026, with around 30 professional exhibitors. At the 2024 edition, carefully selected local nursery growers took part. These two references to different years have different focuses: 2024 concerns the participating nursery growers, while 2026 concerns the edition number and approximate number of professional exhibitors. For Les Vendredis de Lanleff, a 2026 program included karaoke to mark the end of summer. The festival Les Routes de Lanleff is dedicated to promoting artistic creation.

When to travel and how to find a hotel

If a market or cultural program is the reason for your visit, check the specific date before setting your travel dates. Then look for hotels in Lanleff for your planned trip. If your travel dates are flexible, you can make the historic building or scenic route the focus of your stay.

Discover more destinations: Hénansal, Locarn, La Motte, Le Quiou, Magoar, La Landec, Duault, Bringolo

For the broader travel overview: Côtes-d’Armor.