Just east of the town center, these low stone foundations represent the westernmost legionary fort of the Roman Empire. The fort dates back to AD 77, when General Gnaeus Julius Agricola completed the Roman conquest of Wales by capturing the Isle of Anglesey, though much of what you see is from the AD 364 rebuild. The on-site museum and visitor center is open on weekdays. The site is half a mile along the A4085 (to Beddgelert).
Segontium was designed to accommodate a force of up to 1000 infantrymen, and coins recovered from the site indicate that it was an active garrison until AD 394 – a reflection of its crucial strategic position. Spanish-born pretender to the imperial throne, Maximus, based himself here before his failed march on Rome in AD 383.
