150BC to 400AD
Pre-history until the 5th century
The earliest archaeological evidence of inhabitation in the area are the two well-known Iron Age hillforts which dominate the high ground above Nant Gwrtheyrn. Tre’r Ceiri and Yr Eifl were both inhabited between 150 BC and 400 AD. Little is known about these early inhabitants, other than they depended heavily on the local iron which was exported and sold.