Rosedo Lighthouse, Maritime signal tower in Île-de-Bréhat, France.

Rosedo Lighthouse is a small rectangular tower with a rounded face, attached to the slate-roofed keeper's house built of dressed stone and rubble masonry. The white-painted tower carries the inscription "ROSEDO" in dark capitals on a black band near its top, above two small windows with grey stone frames. It stands 13.10 metres tall and rises 40 metres above the sea.

The original structure was built in 1858 but was destroyed in 1944 during World War II by occupying forces. The current tower was reconstructed in 1947 following the wartime damage.

The lighthouse marked a milestone in French maritime history when Marie-Perrine Durand became the first woman to serve as an official lighthouse keeper at this location.

The tower operates automatically and guides maritime traffic through its optical signaling system. Access to the lighthouse requires a boat journey to the island, and the walk to the tower may involve crossing rocky terrain.

Despite its small size, the Rosedo light is described as the most powerful on the Côtes-d'Armor coast. Its focal point sits 11 metres up, and the tower's light reaches 40 metres above the sea. The 1897 optic had a focal length of 0.1875 metres.