[3] It also sat on a road (the Via Julia Montana, or RR623[4]) running from Moridunum (Carmarthen) across to eastern Wales at Castell Collen (Llandrindod Wells).
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.
The road now known as Llanfair Hill runs through the site of the fort enclosure, and may well be on the line of one of the Roman streets.
[7] St Mary's Church, a 12th-century building on the site of an earlier monastic cell, also stands within the fort enclosure.
The chain of military forts across southern Wales appear to have been active between the 70s to 120s AD, although there is some evidence of the site still being occupied into the 4th century.