Gallia Aquitania (ˈɡæliə_ˌækwɪˈteɪniə, ˈɡalːi.a akɥiːˈtaːni.a), also known as Aquitaine or Aquitaine Gaul, was a province of the Roman Empire. It lies in present-day southwest France, where it gives its name to the modern region of Aquitaine. It was bordered by the provinces of Gallia Lugdunensis, Gallia Narbonensis, and Hispania Tarraconensis.
Fourteen Celtic tribes and over twenty Aquitanian tribes occupied the area from the northern slopes of the Pyrenees in the south to the Liger (Loire) river in the north. The major tribes are listed at the end of this section. There were more than twenty tribes of Aquitani, but they were small and lacking in repute; the majority of the tribes lived along the ocean, while the others reached up into the interior and to the summits of the Cemmenus Mountains, as far as the Tectosages.
The name Gallia Comata was often used to designate the three provinces of Farther Gaul, viz. Gallia Lugdunensis, Gallia Belgica, and Aquitania, literally meaning "long-haired Gaul", as opposed to Gallia Bracata "trousered Gaul", a term derived from bracae ("breeches", the native costume of the northern "barbarians") for Gallia Narbonensis.
Most of the Atlantic coast of the Aquitani was sandy and thin-soiled; it grew millet, but was unproductive with respect to other products. Along this coast was also the gulf held by the Tarbelli; in their land, gold mines were abundant. Large quantities of gold could be mined with a minimum of refinement. The interior and mountainous country in this region had better soil. The Petrocorii and the Bituriges Cubi had fine ironworks; the Cadurci had linen factories; the Ruteni and the Gabales had silver mines.
According to Strabo, the Aquitani were a wealthy people. Luerius, the King of the Arverni and the father of Bituitus who warred against Maximus Aemilianus and Dometius, is said to have been so exceptionally rich and extravagant that he once rode on a carriage through a plain, scattering gold and silver coins here and there.
The Romans called the tribal groups pagi.