residence, the Palais-Royal. Versailles was again the unofficial capital of France from June 1722, when Louis XV returned to Versailles, until October 1789, when a Parisian mob forced Louis XVI and the royal family to move to Paris. Versailles again became the unofficial capital of France from March 1871, when Adolphe Thiers' government took refuge in Versailles, fleeing the insurrection of the Paris Commune, until November 1879, when the newly elected government and parliament returned to Paris. During the various periods when government affairs were conducted from Versailles, Paris remained the official capital of France. Versailles was made the préfecture of the Seine-et-Oise département at its inception in March 1790 (at which time Seine-et-Oise had approximately 420,000 inhabitants). By the 1960s, with the growth of the Paris suburbs, the Seine-et-Oise had reached more than 2 million inhabitants, and was deemed too large and ungovernable, and thus it was split into three départements in January 1968. Versailles was made the préfecture of the Yvelines département, the largest chunk of the former Seine-et-Oise. At the 2017 census the Yvelines had 1,438,266 inhabitants. Versailles is the seat of a Roman Catholic diocese (bishopric) which was created in 1790. The diocese of Versailles is subordinate to the archdiocese of Paris. In 1975, Versailles was made the seat of a Court of Appeal whose jurisdiction covers the western suburbs of Paris. Since 1972, Versailles has been the seat of one of France's 30 nationwide académies (districts) of the Ministry of National Education. The académie de Versailles, the largest of France's thirty académies by its number of pupils and students, is in charge of supervising all the elementary schools and high schools of the western suburbs of Paris. Versailles is also an important node for the French army, a tradition going back to the monarchy with, for instance, the military camp of Satory and other institutions. Geography Versailles is located west-southwest from the centre of Paris. The city sits on an elevated plateau, 130 to 140 metres (425 to 460 ft) above sea-level (whereas the elevation of the centre of Paris is only 33 m (108 ft) above sea level), surrounded by wooded hills: in the north the forests of Marly and Fausses-Reposes, and in the south the forests of Satory and Meudon. The city (commune) of Versailles has an area of 26.18 km2 (10.11 sq mi, or 6,469 acres), which is a quarter of the