The commune of Auch is located in the arrondissement of Auch and in the Gers valley, roughly in the centre of the Gers département. Auch is 69 kilometres (43 miles) west of Toulouse, the capital of the Occitanie region, and 74 kilometres (46 miles)from Montauban, 63 kilometres (39 miles) from Agen, 92 kilometres (57 miles) from Mont-de-Marsan, 86 kilometres (53 miles) from Pau and 62 kilometres (39 miles) from Tarbes, the capitals of the neighbouring départements. It is 162 km from Bordeaux, 390 kilometres (240 miles) from Marseille and 409 kilometres (254 miles) from Lyon, the capitals of the neighbouring regions, and 595 kilometres (370 miles)south-west of Paris.[3]
The commune covers an area of 7,248 hectares (17,910 acres).[4]
Auch has a minimum altitude of 115 metres (377 ft) and a maximum of 281 metres (922 ft). Its average altitude is 198 metres (650 ft), while that of its town hall is 134 metres (440 ft)[5] The town and its surroundings have a hillside landscape.[6]
The commune covers an area of 7,248 hectares (17,910 acres), making it the third largest in the département.[7]
Centred on the middle Baïse valley, Armagnac is distributed along an east-west axis between Eauze and Auch. It includes Fezensac and Vic.
The commune is located in seismicity zone 1 (very low seismicity).[8]
Hydrography
The Gers, a tributary of the Garonne, flows through the town and divides the city between the upper town, on the left bank, the site of the medieval city built on a hill where most of the ancient monuments are to be found, and the lower town, built on the plain on the right bank. The upper town is linked to the banks of the Gers by the medieval "pousterles", typical narrow streets with steep inclines, and by the monumental staircase inaugurated in 1863. The north of the town is also watered by the Arçon and Talouch rivers, tributaries of the Gers.
The lower town was devastated on several occasions (1897, 1952 for the most significant river overflow) before the course of the Gers was recalibrated following the 1977 floods in Gascony.[9]
Auch is a very ancient town, whose settlement was noted by the Romans during their conquest of the area in the 50s BC. At that time, it was settled by an Aquitanian tribe known to the Romans as the Ausci. Their name for the town was Climberrum[13] or Elimberris.[14] This has been tentatively etymologized from the Iberianiltir ("town, oppidum") and a cognate of the Basqueberri ("new"), although another Iberian settlement in Granada recorded by the Romans as "Iliberi" probably had no contact with proto-Basque speaking peoples.[15] The Romans renamed the town Augusta Auscorum or Ausciorum ("Augusta of the Ausci"). Augusta Auscorum was one of the twelve civitates of the province of Novempopulana (Gascony) and became the provincial capital after the 409 destruction of Eauze by the Vandals.
The common term Augusta was eventually[when?] dropped and the name evolved into the modern GasconAush and French Auch.
La Tour d'Armagnac, a 14th-century prison, as well as a statue of d'Artagnan who was based on the real life person, Charles de Batz, Comte d'Artagnan born nearby in the château de Castelmore, and written about by Alexandre Dumas.
^"Auch (32)"(PDF). Fiche Climatologique: Statistiques 1981–2010 et records (in French). Meteo France. Archived from the original(PDF) on 16 April 2018. Retrieved 16 April 2018.