Situated on the southern bank of the Vieux-Port above the dry dock, this abbey founded in the 5th century on the tomb of an ancient Christian martyr played an important role in Christianity’s development in the Mediterranean between the 11th and 18th centuries. In the 14th century, Pope Urbain V (then installed in Avignon) oversaw its fortification. The abbey’s crypt and catacombs, which contain a number of ancient sarcophagi, are open to visitors, whilst its excellent acoustics make it the perfect venue for the religious and classical music concerts held here on a regular basis. Large crowds attend its special ceremonies for la fête de la Chandeleur (Candlemas) in February.