If you were obliged to choose just one city to visit in Provence, lovely little Arles would give Avignon and Aix a run for their money. It's too charming to become museumlike yet has a wealth of classical antiquities and Romanesque stonework; quarried-stone edifices and shuttered town houses shading graceful Old Town streets and squares; and pageantry, festivals, and cutting-edge arts events. Its atmospheric restaurants and picturesque small hotels make it the ideal headquarters for forays into the Alpilles and the Camargue.
It wasn't always such a mellow site. A Greek colony since the 6th century BC, little Arles took a giant step forward when Julius Caesar defeated Marseille in the 1st century BC, transforming it into a formidable civilization—by some accounts, the Rome of the north. Fed by aqueducts, canals, and solid roads, it profited from all the Romans' modern conveniences: straight paved streets and sidewalks, sewers and latrines, thermal baths, a forum, a hippodrome, a theater, and an arena. It became an international crossroads by sea and land and a market to the world. The emperor Constantine himself moved to Arles and brought with him Christianity.
The remains of this golden age are reason enough to visit Arles today. Yet its character nowadays is as gracious and low-key as it once was cutting-edge. If you plan to visit many of the monuments and museums in Arles, purchase a visite générale ticket for €15, which covers admission to all of them.