Vichy is a city in the Allier department in central France. Located on the Allier river, it is a major spa and resort town and during World War II was the capital of Vichy France. As of 2021, Vichy has a population of 25,789. Known for its mineral springs since the Roman times, Vichy had become a major destination for the French nobility and the wealthy by the late 18th century. The town developed further under the patronage of Napoleon III. Following the 1940 armistice, the pro-German collaborationist government headed by Philippe Pétain set up at Vichy, which remained the de facto capital of the French rump state for the next four years.