Versailles A new town founded by order 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 as a 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, gather in the Château de Versailles to vote on revisions to the Constitution.