Vichy welcomed 40,000 "curistes" in 1900, and that figure had risen to nearly 100,000 just before the onset of the First World War. "La vie thermale" had its heyday in the 1930s. The success in treating ailments that was attributed to the Vichy Baths led "la Compagnie Fermière" to enlarge the Baths again by creating the Callou and Lardy Baths. The Art Nouveau-style Opéra, inaugurated in 1903, accommodated all the great names on the international scene. Vichy became the summertime music capital of France, but the war of 1914 would put a brutal end to that development.