Le Grau-du-Roi lighthouse, Maritime lighthouse in Le Grau-du-Roi, France.

Le Grau-du-Roi lighthouse stands at the canal entrance, marking the passage between the Mediterranean Sea and the inland waterways of Camargue. The structure rises from the harbor area and remains visible from various vantage points along the water's edge.

The lighthouse began operations in 1829 as a critical navigation point for vessels entering the canal system connecting to Aigues-Mortes. Its establishment marked an important moment in the development of the harbor's maritime infrastructure.

The tower is known as the phare du Grau d'Aigues-Mortes, after the canal mouth it once marked. It was built under the first French coastal lighting programme launched by Fresnel in 1825, and has been a classified historical monument since 9 October 2012.

The tower stands on the Grau-du-Roi commune in Petite Camargue gardoise, on the Mediterranean coast of southern Gard. It is a disused lighthouse, replaced in 1869 by the Espiguette lighthouse, so there is no beacon to watch for at dusk. Look for the cylindrical stone tower on its square base, with the glassed watch room and domed lantern above.

The tower was built in 1828 by engineer Paul Courant as part of the first French coastal lighting programme launched by Fresnel in 1825. It was replaced by the Espiguette lighthouse in 1869 and has been a classified historical monument since 9 October 2012. Ten plans of the lighthouse from 1828-1852 are held by the National Archives.