Bouches-du-Rhône ( , , ; ; "Mouths of the Rhône") is a department in southern France. It borders Vaucluse to the north, Gard to the west and Var to the east. The Mediterranean Sea lies to the south. Its prefecture and largest city is Marseille; other important cities include Aix-en-Provence, Arles, Martigues and Aubagne.
Marseille, France's second-largest city, has one of the largest container ports in the country. It prizes itself as France's oldest city, founded by Greek settlers from Phocaea around 600 BC. Bouches-du-Rhône is the most populous department of the Provence-Alpes-Côte d'Azur region, with 2,043,110 inhabitants as of 2019. It has an area of . Its INSEE and postal code is 13.
History
The history of the area is closely linked to that of Provence. Marseille has been an important harbour since before Julius Caesar's conquest of Gaul. The Roman presence left numerous monuments across the department. Notable people born in the area include Romantic painter Camille Roqueplan and his brother, journalist and theatre director Nestor Roqueplan.
Bouches-du-Rhône is one of the original 83 departments created during the French Revolution on 4 March 1790. It was created from the western part of the former province of Provence and the principalities of Orange, Martigues and Lambesc. It lost part of its territory in 1793, including Orange and Apt, when the department of Vaucluse was created.
Following its creation, the department strongly supported the French Revolution, containing 90 Jacobin Clubs by 1794. It was also noteworthy that more than half of the priests in the department accepted the Civil Constitution of the Clergy, which in effect subordinated the church to the government. During the ascendancy of the French Communist Party in the 20th century, election results showed that support for left-wing politics remained relatively strong there, especially in the northern suburbs of Marseille.
Geography
Natural regions
The department is part of the current region of Provence-Alpes-Côte d'Azur. It is surrounded by the departments of Gard on the west, Vaucluse on the north and Var on the east, as well as by the Mediterranean Sea on the south. The Rhône river delta forms a vast swampy wetlands area called the Camargue in the southwestern part of the department. The Rove Tunnel, the world's longest canal tunnel from Marseille to the Étang de Berre, as well as smaller canals further west, allowed for waterway transport from Marseille to the Rhône until 1963, when the Rove Tunnel closed to traffic.
Bouches-du-Rhône is bordered by the rivers Rhône to the west and Durance to the north. The Rhône divides into the Grand Rhône and Petit Rhône south of Arles; the area between forms the Camargue. The principal mountains of the department are the Sainte-Baume massif (1,042 metres – 3,418 feet), Montagne Sainte-Victoire (1,011 metres – 3,316 feet), the Garlaban and Alpilles massifs.
Seismic activity
The department of Bouches-du-Rhône is also known for its seismic activity: the zone II ("average seismic activity") townships of Lambesc Peyrolles-en-Provence and Salon-de-Provence are the most exposed.
Areas Ib ("low seismic activity") including the cantons of Aix-en-Provence, Trets Eyguières, Orgon, Berre-Pond, Istres, Istres-North and South, and Ia areas ("very low seismic activity") including the other cantons in the district of Aix-en-Provence, Arles-East, Châteaurenard, Saint-Rémy-de-Provence, Marignane, Martigues-East and Roquevaire-West, are least exposed. Zone 0 ("negligible seismic activity") includes the rest of the department.
Climate
The department has a Mediterranean climate, with contrasting temperatures within a range of 15 degrees. Precipitation is irregular, with only 65 days per year where rain falls in excess of 1 mm. However it falls in sudden downpours, with an average of annually. This mainly happens in the spring and autumn; summer is very hot, winter mild. Violent winds are common, especially the famed mistral, which blows 100 days per year with a maximum of . The coast is drier, especially along the Côte Bleue, the Calanques and the bay of La Ciotat, which include some of the driest areas in France, with only of rain per year. Higher areas receive more precipitation and lower temperatures. The Arc region in the interior is much colder than other areas, with heavy frosts in winter.
Demographics
Principal towns
The most populous commune is Marseille, the prefecture. As of 2019, there are 14 communes with more than 20,000 inhabitants: