Bigorre (; Gascon: Bigòrra) is a region in southwest France, historically an independent county and later a French province, located in the upper watershed of the Adour, on the northern slopes of the Pyrenees, part of the larger region known as Gascony. Today Bigorre comprises the centre and west of the département of Hautes-Pyrénées, with two small exclaves in the neighbouring Pyrénées Atlantiques. Its inhabitants are called Bigourdans. Before the French Revolution, the province of Bigorre had a land area of 2,574 km² (994 sq. miles). Its capital was Tarbes. At the 1999 French census, there lived 177,575 inhabitants on the territory of the former province of Bigorre, which means a density of 69 inh. per km² (179 inh. per sq. mile). The largest urban areas in Bigorre are Tarbes, with 77,414 inhabitants in 1999, Lourdes, with 15,554 inhabitants in 1999, and Bagnères-de-Bigorre, with 11,396 inhabitants in 1999. At the time of the Roman conquest, the area of Bigorre was inhabited by the Bigorri or Bigerri, who gave their name to the region. The Bigorri were probably speakers of Aquitanian, a language possibly related to Basque. Bigorre was conquered by the Roman general Julius Caesar in 56 BC and incorporated into the province of Gallia Aquitania. In the fourth century, Aquitania was divided in three, for administration; the region that became Bigorre was part of the southernmost section, Aquitania tertia or Novempopulana. Like the rest of Aquitaine, Bigorre was subsumed within the Visigothic kingdom during the fifth century. After the Battle of Vouillé (507), where the Franks defeated the Visigoths and forced them out of Aquitaine, Bigorre became part of the Frankish kingdom, usually held by the same king who controlled Toulouse. Under the Merovingian kings, Bigorre was a civitas (Latin Begorra), the chief settlement of which was Cieutat. It was part of the morganegyba of Galsuintha from her husband, Chilperic I. On Galsuintha's murder it passed to her sister Brunhilda as part of the arbitration imposed by Guntram of Burgundy. By the Treaty of Andelot (587) Guntram acquired possession of it and it remained with Burgundy until the reunion of various Frankish kingdoms in 613. The history of Bigorre in the seventh and eighth centuries is obscure. It was apparently part of the Basque Duchy of Gascony which was often at odds with the Frankish Duchy of Aquitaine. The County of Bigorre was formed by the Dukes of Gascony