Roman Fort - Alabum

The rectangular enclosure that defined this Roman fort was built in the 70s AD as part of the campaign to integrate southern Wales into the Roman province of Britannia Superior. It lay on a key road, now known as the Sarn Helen, from the legionary fortress of Isca Augusta that ran north west across Wales to Bremia and on to North Wales. It also sat on a road running from Moridunum across to eastern Wales at Castell Collen. It thus held an important crossroads along with a bridging point over the River Towy, and the town that grew up near the fort retained its significance and became Llandovery.

Source: Wikipedia