The Saints, Marie Jacobe and Marie Salome, were buried near a gusher. This lead to a cult around the 5th century and a chapel was built near the river's mouth there in 922.
The Church of Les Saintes Maries de la Mer held an important strategic position, as a matter of fact, at the time of its construction, between the 9th and the 12th century, pirates and Scarens were attacking the coast.
It has a unique nave that is 15 metres high, a choir and an apse overlooked by a keep ion a hemycicle enclosing the old guard room called " high chapel". The church towers over the village is visible from 6 miles away.
The church also served as a refuge for the inhabitants of the city and, inside, even a well is fund. Nowadays, the statue of Saintes Sara, a major figure of the Gypsy cultural tradition, is kept in the crypt, just beside a pagan altar from the 4th century.