|Elevation||2–46 m (6.6–151 ft)
(avg. 9 m or 30 ft)
|Land area1||19.70 km2 (7.61 sq mi)|
|- Density||991 /km2 (2,570 /sq mi)|
|INSEE/Postal code||40088/ 40100|
|1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km² (0.386 sq mi or 247 acres) and river estuaries.|
|2 Population without double counting: residents of multiple communes (e.g., students and military personnel) only counted once.|
It is particularly famous as a spa, specialising in mud treatment for rheumatism and similar ailments.
It is also a market town, former bishopric and busy local centre, especially for the Chalosse area.
It was first established by the Romans, and its reputation is supposed to date from a visit by Julia, the daughter of the first Emperor Octavian Augustus. Its Roman name was Civitas Aquensium. In the Middle Ages, it was administered by viscounts until 1177. With the acquisition of Aquitaine by Henry II Plantagenet, later King of England, Dax remained under the English rule until 1451, when it was conquered by the French troops before the end of the Hundred Years' War. It successfully withstood a Spanish siege in 1521-1522.
Later Dax kept its tradition as a renowned spa site.
Main sights 
- Roman archaeological crypt, including the foundings of a Roman temple from the second century AD.
- Remains of the Gaul-Roman walls (4th century)
- Cathedral of Notre-Dame Ste-Marie
- Church of Saint-Vincent-de-Xaintes.
- Fontaine Chaude ("Hot Fountain").
Twin towns 
- Logroño, Spain
Notable people 
- Maurice Boyau, ace of the First World War who spent most of his life in Dax.
- Jean-Charles de Borda, mathematician born in Dax.
- Vincent de Paul, theologian born in a village nearby Dax.
- Victor Denain, aviator and politician
- Roger Ducos, politician born in Dax
- Patrick EdlingerRock climber,Verdon Gorge soloist
- Brigitte Lovisa Fouché, French painter
- Raphaël Ibañez, rugby player born in Dax.
- Christophe Lamaison, rugby player born in Dax.
See also 
- New York Times obit
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