Stonehenge is a prehistoric monument in the British Isles. It is the centre of one of the world's earliest cultures. The larger stones in the circle are Sarsen stones, brought from Marlborough Downs, 19 miles away. The smaller stones, known as Bluestones, are from the Preseli Mountains in Wales, 240 miles away.
The prehistoric monument was constructed in 3 main phases.
- 3050 BC (5050 years ago): circular ditch and bank (a henge)
- Circa 2600 BC (4,600 years ago): wooden structure constructed at centre
- 2500-1500 BC (4,500-3,500 years ago ): stone monument constructed, arranged and re-arranged over about 1000 years