Mulhouse is a city and commune in eastern France, it is close enough to Basel, Switzerland and Freiburg, Germany to share the EuroAirPort international airport with these two cities. The city joined the Swiss Confederation as an associate in 1515 and was therefore not annexed by France in the Peace of Westphalia in 1648 like the rest of the Sundgau. An enclave in Alsace, it was a free and independent Calvinist republic, known as Stadtrepublik Mülhausen, associated with the Swiss Confederation until, after a vote by its citizens on 4 January 1798, it became a part of France in the Treaty of Mulhouse signed on 28 January 1798, during the Directory period of the French Revolution. Mulhouse is famous for its museums, especially the Cité de l’Automobile (also known as “Musée national de l’automobile”) and the Musée Français du Chemin de Fer (also known as “Cité du train”), respectively the largest automobile and railway museums in the world. An industrial town nicknamed “the French Manchester”.