Megalithic landscapes of Carnac and South Morbihan

Learn more



Er Lannic megalithic enclosures

Er Lannic is an island in the Gulf of Morbihan which has a double megalithic enclosure, part of which is under water. 

Opposite the Island of Gavrinis lies a small islet with one of the best-known monuments in the Gulf of Morbihan: the Er Lannic double megalithic enclosure. Often known as “cromlechs” (stone circles), these two monuments form twin horseshoe-shaped enclosures. 

Excavated and restored by Z. Le Rouzic in the early twentieth century, a large quantity of ceramic fragments were found on the site (hollow-based cups) suggesting that the site may have had a religious use.

Today only the highest part of the enclosure is visible, the other part appearing at low tide. The second enclosure is below water, clearly demonstrating that the sea level has risen since the Neolithic Era.

This site is private property and the island a bird reserve. Access is therefore prohibited. It is however visible from the Gavrinis site or from the sea.