In 72 BCE the Roman General Pompey, while on the way back to Rome after a military campaign in Spain, founded a Roman colony in Saint-Bertrand-de-Comminges. The goal was to defend the passage to the Aran Valley and the Iberian peninsula. The colony was named Lugdunum Convenarum and had reached around 30,000 people at its highest point. It belonged to the Roman province of Novempopulana and had a growing Christian community, which by the late fourth century got its own Diocese of Comminges, which was suffragan of the Metropolitan Archdiocese of Eauze.
It is believed to have been the place of exile from 39 AD of Herod Antipas, with his wife Herodias, under Emperor Caligula's orders. In 405 the Vandals sacked the city and forced the peasantry to move to the citadel.
In an open field just outside the village centre, this small archaeological site has a few ruins from the town's Roman days. You'll have to use your imagination to picture the theatre, market, temple and other public buildings from the fragments of low-rising stone foundations.
The Broch of Gurness is an Iron Age broch village. Settlement here began sometime between 500 and 200 BC. At the centre of the settlement is a stone tower or broch, which once probably reached a height of around 10 metres. Its interior is divided into sections by upright slabs. The tower features two skins of drystone walls, with stone-floored galleries in between. These are accessed by steps. Stone ledges suggest that there was once an upper storey with a timber floor. The roof would have been thatched, surrounded by a wall walk linked by stairs to the ground floor. The broch features two hearths and a subterranean stone cistern with steps leading down into it. It is thought to have some religious significance, relating to an Iron Age cult of the underground.
The remains of the central tower are up to 3.6 metres high, and the stone walls are up to 4.1 metres thick.