Trianon
noun/ˈtɹiːəˌnɒn/
Etymology From French Trianon, the name of a hamlet that formerly occupied the site on which the Grand Trianon would be built.
1
Either of the Grand Trianon and Petit Trianon, two royal palaces constructed in Versailles, France, in the 17th and 18th centuries.
2
Historical, Metonymically The Treaty of Trianon, a peace treaty signed in the Grand Trianon on 4 June 1920, which formally ended World War I between most of the Allies and the Kingdom of Hungary, leaving Hungary as a landlocked state with less than one-third of its prewar area.