The Neolithic (4500 BC - 2500 BC)

The Neolithic saw the introduction of farming and pottery, and the use of more advanced stone implements. It was once thought that these innovations were introduced by a new wave of settlers, but there is no compelling evidence for a large-scale invasion at this point in Irish history. It is much more likely that the Neolithic revolution was a long and slow process resulting from trade and overseas contacts with agricultural communities in Britain and on the continent.
Agriculture began around 4500 BC. Sheep, goats, cattle and cereals were imported from Britain and the continent, and the population rose significantly. At the Céide Fields in County Mayo, an extensive Neolithic field system - arguably the oldest in the world - has been preserved beneath a blanket of peat. Consisting of small fields separated from one another by dry-stone walls, the Céide Fields were farmed for several centuries between 3500 and 3000 BC. Wheat and barley were the principal crops cultivated.
Pottery made its appearance around the same time as agriculture. Ware similar to that found in northern Britain has been excavated in Ulster (Lyle's Hill pottery) and in Limerick. Typical of this ware are wide-mouthed, round-bottomed bowls.
But the most striking characteristic of the Neolithic in Ireland was the sudden appearance and dramatic proliferation of megalithic monuments. The largest of these tombs were clearly places of religious and ceremonial importance to the Neolithic population. In most of the tombs that have been excavated human remains - usually, but not always, cremated - have been found. Grave goods - pottery, arrowheads, beads, pendants, axes, etc - have also been uncovered.