Away from its glamorous tourist centre, Marseille's drug war spirals out of control.
To understand Marseille catch a bus - number 30 from the Bougainville metro station. The route starts at the northern terminus of the metro system, 5km from the city centre. It winds past motorways, factories, unofficial rubbish tips and a 10th-century monastery.
France's second city sprawls for another 10km over ridge after ridge of limestone hills. Each is crowned by a white citadel gleaming in the Mediterranean sunshine which, as the bus approaches, turns into a group of shabby tower blocks.
Up to the 1960s, these were the scrubland and the hard-scrabble villages of the Marcel Pagnol novels set in the early part of the century. Fragments of the Provencal villages can still be seen. The "garrigue", or scrub, survives on the jagged mountains which crowd in from the east. But Marius, Jean de Florette and Manon des Sources and their descendants have long gone. My fellow passengers on the 45-minute ride to La Savine, one of the northernmost estates, are a blend of North Africans, Africans, Asians and Roma.
The bus passes through the poorest districts of the poorest city in France. Almost 40 per cent of people who live here are below the poverty line, compared to 26 per cent in Marseille as a whole and 15 per cent nationally. In the richer, mostly white areas south of the city centre, the risk of dying before the age of 65 is 23 per cent below the national average. In north Marseille, it is 30 per cent higher than the French average.