Versailles () is a commune in the department of the Yvelines, Île-de-France, renowned worldwide for the Château de Versailles and the gardens of Versailles, designated UNESCO World Heritage Sites. Located in the western suburbs of the French capital, from the centre of Paris, Versailles is a wealthy suburb of Paris with a service-based economy and is a major tourist destination. According to the 2017 census, the population of the city is 85,862 inhabitants, down from a peak of 94,145 in 1975. A new town founded at the will of King Louis XIV, Versailles was the de facto capital of the Kingdom of France for over a century, from 1682 to 1789, before becoming the cradle of the French Revolution. After having lost its status of royal city, it became the préfecture (regional capital) of the Seine-et-Oise département in 1790, then of Yvelines in 1968. It is also a Roman Catholic diocese. Versailles is historically known for numerous treaties such as the Treaty of Paris, which ended the American Revolution, and the Treaty of Versailles, after World War I. Today, the Congress of France – the name given to the body created when both houses of the French Parliament, the National Assembly and the Senate, meet – gathers in the Château de Versailles to vote on revisions to the Constitution. Name The argument over the etymology of Versailles tends to privilege the Latin word versare, meaning "to keep turning, turn over and over", an expression used in medieval times for plowed lands, cleared lands (lands that had been repeatedly "turned over"). This word formation is similar to Latin seminare ("to sow") which gave French semailles ("sowings", "sown seeds"). During the Revolution of 1789, city officials had proposed to the convention to rename Versailles Berceau-de-la-Liberté ("Cradle of Liberty"), but they had to retract their proposal when confronted with the objections of the majority of the population.<ref>[http://gallica.bnf.fr/ark:/12148/bpt6k67101h.notice Georges Moussoir, Versailles, "Berceau de la Liberté", in Revue de l'histoire de Versailles et de Seine-et-Oise, 1899, pp. 215–224] (Gallica)</ref> A seat of power From May 1682, when Louis XIV moved the court and government permanently to Versailles, until his death in September 1715, Versailles was the unofficial capital of the kingdom of France. For the next seven years, during the Régence of Philippe d'Orléans, the royal court of the young King Louis XV was the first in Paris, while the Regent governed from his Parisian