The stone circles in the British Isles and Brittany are a megalithic tradition of monuments consisting of standing stones arranged in rings. These were constructed from 3200 to 2000 BCE in Great Britain, Ireland and Brittany. It has been estimated that around 4,000 of these monuments were originally constructed in these parts of north-western Europe during this period. Around 1,300 of them are recorded, the others having been destroyed.
Although stone circles have been erected throughout history by a variety of societies and for a variety of reasons, in the Late Neolithic and Early Bronze Ages, this particular tradition was limited to Great Britain, Ireland and the neighbouring area of continental Europe now known as Brittany. The rings were not distributed equally across this area, but were concentrated in several highland regions: north-eastern and central Scotland, the Lake District, the south-west peninsula of England, and the north and south-west of Ireland. Sparser groupings can also be found in Caithness, the Outer Hebrides, the Peak District, the Wicklow Mountains, Wales and Wessex.