8 Best Sights in Aix, Marseille, and the Central Coast, Provence

Founded in the 4th century by St-Cassien, who sailed into Marseille full of fresh ideas on monasticism that he acquired in Palestine and Egypt, this church grew to formidable proportions. With a Romanesque design, the structure would be as much at home in the Middle East as its founder was. The crypt, St-Cassien's original, is preserved beneath the medieval church, and in the evocative nooks and crannies you can find the 5th-century sarcophagus that allegedly holds the martyr's remains. Upstairs, a reliquary contains what's left of St-Victor, who was ground to death between millstones, probably by Romans. There's also a passage into tiny catacombs where early Christians worshipped St-Lazarus and Mary Magdalene, said to have washed ashore at Stes-Maries-de-la-Mer, in the Camargue.

This gargantuan, neo-Byzantine, 19th-century fantasy was built under Napoléon III—but not before he'd ordered the partial destruction of the lovely 11th-century original, once a perfect example of the Provençal Romanesque style. You can view the flashy interior (think marble and rich red porphyry inlay) of the newer of the two churches; the medieval one is being restored.

Toulon’s historic Romanesque cathedral was built in the 11th-century with successive additions in the 17th and 18th centuries done in the Provençal-baroque style. Among the notable artworks decorating the church’s dusky interior is a monumental marble altarpiece depicting God the Father surrounded by a throng of lifelike angels and two 17th-century paintings by Pierre Puget, a Marseille native whose sculptures once graced the palace of Versailles and are now housed in the Louvre. Francis I had the cathedral converted to a mosque in the winter of 1543–44 to accommodate the Muslim corsairs stationed in Toulon during the long Franco-Ottoman alliance to aid the king in his campaigns against Italy and Charles V.

Many eras of architectural history are clearly delineated and preserved here. The cathedral has a double nave—Romanesque and Gothic side by side—and a Merovingian (5th-century) baptistery, its colonnade mostly recovered from Roman temples built to honor pagan deities. The deep bath on the floor is a remnant of the total-immersion baptisms that used to occur here, marking the forsaking of one's old life (going down into the water) for a new life in Christ (rising up from the water). Shutters hide the ornate 16th-century carvings on the portals, opened by a guide on request. The guide can also lead you into the tranquil Romanesque cloister next door, with carved pillars and slender columns.

The extraordinary 15th-century Triptyque du Buisson Ardent (Mary and the Burning Bush) was painted by Nicolas Froment in the heat of inspiration following his travels in Italy and Flanders, and depicts the generous art patrons King René and Queen Jeanne kneeling on either side of the Virgin, who is poised above a burning bush. To avoid light damage, it's rarely opened for viewing; check with the tourist office beforehand.

Though the facade now bears 19th-century touches, this small 17th-century church still contains the center panel of the fine 15th-century Annunciation Triptych, attributed to the father of Jan Van Eyck, the greatest painter of the Early Netherlandish school. Some say the massive painting on the left side of the transept is a Rubens. The church is used regularly for classical concerts.

This 12th-century church served as a chapel of the Knights of Malta, a medieval order of friars devoted to hospital care. The church was Aix's first attempt at the Gothic style, and it was here that the counts of Provence were buried throughout the 18th century; their tombs (in the upper left) were attacked during the revolution and have been only partially repaired.

Just east of Bandol on the D559, past the smaller resort of Sanary, as you turn left onto the D63 you'll see signs pointing to the small stone chapel of Notre-Dame de Pépiole. It's hemmed in by pines and cypresses and is one of the oldest Christian buildings in France, dating from the 6th century and modeled on early churches in the Middle East. The simple interior has survived the years in remarkably good shape, although the colorful stained glass that fills the tiny windows is modern—composed mainly of broken bottles.

Towering above the city and visible for miles around, this overscaled neo-Byzantine basilica was erected in 1853 by Napoléon III. The interior is a Technicolor bonanza of red-and-beige stripes and glittering mosaics, and the gargantuan Madonna and Child on the steeple (almost 30 feet high) is covered in real gold leaf. While the panoply of ex-votos, mostly thanking the Virgin for deathbed interventions and shipwreck survivals, is a remarkable sight, most impressive are the views of the seaside city at your feet.