About the Area
Pembrokeshire has numerous prehistoric (such as Pentre Ifan) and historic places, including a number of almost-complete and ruined castles dating from Norman times. Human habitation of the region of Pembrokeshire extends back to between 125,000 and 70,000 BCE. By the late Roman Empire period between 350 and 400, an Irish tribe known as the Déisi settled in the region, with their realm known as Demetae. In the post-Roman period, the Irish Déisi merged with the local Welsh, with the regional name underlying Demetae evolving into Dyfed, which existed as an independent petty kingdom until its heiress, Elen, married Hywel Dda in 904. Hywel merged Dyfed with his own maternal inheritance of Seisyllwg, forming the new realm of Deheubarth ("southern district"). The region suffered from devastating and relentless Viking raids during the Viking Age, with the Vikings establishing settlements and trading posts at Haverfordwest, Fishguard and Caldey Island.
