Neolithic

The Neolithic or New Stone Age began around 10,000BC in the Middle East and is characterized by the development of agriculture and the making of polished stone implements.

Around 3000 BC New Stone Age farmers came to Pembrokeshire by sea, hugging the coasts in their frail curragh-type craft. Only one of their settlements has been found in Pembrokeshire, with traces of a small round structure and a rectangular building beneath the fortifications of a later hill-fort at Clegyr Boia, west of St. David's.

These people are remembered, however, by the most remarkable great stone, or megalithic, monuments in the form of communal tombs or burial chambers. The chamber, or cromlech, was constructed by placing a massive capstone on upright stone pillars and covering the whole with stones or earth in the shape of a round, or long mound. In most cases the mound has been removed leaving the stones.