Thermes nationaux d'Aix-les-Bains, Historic thermal bath in Aix-les-Bains, France

Thermes nationaux d'Aix-les-Bains is a light-beige building in central Aix-les-Bains whose lower section has a colonnade of tall rectangular columns, with rows of small windows and triangular brackets below the roofline. On the left it rises in tiered setbacks topped by a flat roof with a band of windows; on the right a tower section carries a dark glass panel reading "Thermes nationaux" and "Aix-les-Bains". A paved plaza lies in front.

The first thermal building was inaugurated in 1783 after the Duke of Chablais's 1772 visit prompted a royal bathing project; it was soon too small, and an annex was completed in 1832 under King Charles Albert. A new establishment designed by architect Pellegrini opened in 1862 after seven years of work and financial difficulties. The Revel annex followed in 1881, the Lecoeur annex in 1899, and the Pétriaux baths in 1933; between 1971 and 1974 architect Mabileau added a seven-storey administrative tower.

The building's name recalls the Victor-Amédée baths inaugurated in 1783, when the Duke of Chablais's visit prompted a royal bathing project. Today the former baths house the town's tourist office and the École nationale Peyrefitte Esthétique, so visitors pass through rooms once used for thermal cures.

The building now serves municipal functions including the tourist office and a specialized school, located in central Aix-les-Bains. Visitors can explore the exterior and accessible interior spaces to get a sense of the building's scale and layout.

The Pétriaux building, added from 1933, keeps two luxury treatment cabins decorated with Art Deco mosaics. Between 1971 and 1974 architect Mabileau added a seven-storey administrative tower to that same building, raising the complex's floor area well beyond its original extent.