The Abbaye Saint-Victor stands on the south side of the Vieux-Port, the most important Christian site in Marseille and one of the oldest religious buildings in southern France. It was founded in the 5th century by John Cassian over the tombs of early Christian martyrs, and the original burial caves still form the crypt — a low, vaulted space full of sarcophagi from the 3rd to 5th centuries, including the supposed tomb of Saint Victor himself.
The above-ground church, fortified in the 11th and 14th centuries, has the look of a small castle: massive stone walls, narrow windows, square towers. The interior is restrained and atmospheric — austere Romanesque vaulting rather than gothic flourish — and worth visiting even briefly. The crypt is the highlight: pay the small entry fee, descend the steep steps, and walk among the carved sarcophagi by candlelight effect. Opposite the abbey, the Four des Navettes bakery has been making the city's traditional orange-flower biscuit since 1781.