Discover Majesty of the Saint-Eloi church. Saint-Eloi church in Andernos is one of the oldest religious buildings in the Bay of Arcachon. It is the Romanesque church of 11th century. The only church of Romans that remains since 5th century is the Saint-Eloi church in Andernos. Majesty of Saint-Eloi church in Andernos The church is located on the beach. At …