Stonehenge, on Salisbury Plain in southern England, is one of the world's best-known prehistoric monuments. Its giant stones attract speculation, yet decades of archaeology have established a good deal about when and how it was built, even if some questions remain open.
Key takeaways
- Stonehenge developed over many centuries, with the main stone phases around 2500 BCE.
- Its large sarsen stones were probably sourced about 25 kilometres away, while smaller bluestones came from Wales.
- It was part of a wider landscape of monuments, burials and settlements.
- No single purpose is proven. Burial, ceremony and astronomy have all been proposed.
- Claims about aliens or lost civilisations have no archaeological support.
A monument in stages
The first phase of Stonehenge, a circular ditch and bank with a ring of pits, dates to around 3000 BCE. The better-known standing stones were raised later, in the late Neolithic and early Bronze Age. The large sarsens, with some topped by horizontal lintels, were arranged in a circle and an inner horseshoe, and smaller bluestones were set up in various arrangements.
Where the stones came from
Geochemical studies published in 2020 traced most of the large sarsen stones to a site called West Woods, about 25 kilometres to the north. The bluestones, weighing a few tonnes each, come from quarries in the Preseli Hills and other sites in west Wales, roughly 200 kilometres away. How the stones were transported is still researched. Experiments suggest that sledges, rollers and large teams of people were enough, though the exact methods are debated.
A landscape, not an isolated ring
Archaeologists have found that Stonehenge sits in a landscape full of ancient monuments. Nearby is Durrington Walls, a large settlement and henge that may have housed builders and been used for seasonal feasts, and the Avenue, a ceremonial path linking Stonehenge to the River Avon. Barrows, burial mounds, dot the surrounding hills.
Burials
Excavations have uncovered cremated human remains at Stonehenge, dating mostly to the early phases of the monument. Analysis of these remains suggests that some of the people buried there may have come from distant areas, perhaps including west Wales, which hints at long-distance connections.
What was it for?
There is no written record from the time, so interpretations rely on evidence. Its alignment with the midsummer sunrise and midwinter sunset suggests the solstices were important, and some researchers see it as a place for ceremonies, gatherings or honouring ancestors. Others have proposed that it was a healing place or a symbol of unity. Most archaeologists think it served several purposes over its long history.
Who were the builders?
The builders were Neolithic and Bronze Age communities, farmers who lived in the region and had no metal tools for the earliest phases. Later studies of ancient DNA are shedding light on population changes in Britain during this period.
Myths and the Druids
Stonehenge is often linked to Druids, but the monument was built long before the Druids of the Iron Age and Roman era. Modern Druids hold ceremonies there today, as do many visitors on the solstices.
Visiting and protection
Stonehenge is a World Heritage Site, and access is managed to protect it. Visitors should follow site rules and avoid touching the stones.
A timeline of construction
Archaeologists describe several phases. Around 3000 BCE, a circular ditch and bank were dug, with a ring of timber or pits inside. Around 2500 BCE, the large sarsen stones were raised in a circle with lintels and an inner horseshoe, and the bluestones were set up in various patterns over the following centuries. Later, the monument was modified, with some stones moved or removed, and the Avenue linking it to the river was built. Radiocarbon dating of antler picks, bones and charcoal found at the site helps build this sequence, though details are refined as new evidence appears.
Astronomy and alignments
The monument's main axis points toward the midsummer sunrise and the midwinter sunset. At the summer solstice, the Sun rises close to the Heel Stone outside the circle and shines into the centre, and thousands of people gather to watch. Some researchers argue that the builders carefully planned these alignments and that the site worked as a calendar. Others caution that many lines could be drawn between stones and that alignments may be partly coincidence. The evidence for the solstice link is stronger than for claims that Stonehenge was a precise astronomical computer.
Recent discoveries
Study of the site has been very active. Remote sensing in the Stonehenge Hidden Landscapes Project in the 2010s revealed many buried features around the monument. Excavations at Durrington Walls found evidence of large feasts and a village, and a large circle of deep pits was reported nearby in 2020. In 2024, researchers reported that the Altar Stone, a large stone at the centre, came from northern Scotland, hundreds of kilometres away, not from Wales as previously thought. Each discovery shows how widely people travelled and traded in prehistoric Britain.
Visiting and management
Stonehenge is managed by English Heritage and the National Trust, and it forms part of a World Heritage Site that includes Avebury and the surrounding landscapes. Visitors usually walk around the stones on a path, although special access is offered outside normal hours, and on the solstices and equinoxes people are allowed to enter the circle. A busy road passes close by, and plans to build a tunnel to hide it have been debated for years because of concern about archaeology below the ground.
Other stone circles
Stonehenge is the best known, but Britain and Ireland have more than a thousand stone circles. Avebury in Wiltshire has the largest stone circle in Britain, enclosing part of a village. The Ring of Brodgar in Orkney and the Callanish Stones in the Outer Hebrides are also impressive. Across the Channel, the stone rows at Carnac in France contain thousands of standing stones. Together, they suggest that raising monumental stones was an important part of life in prehistoric northwestern Europe.
Frequently asked questions
How old is Stonehenge?
Its earliest phase dates to about 5,000 years ago, and the main stone circle to roughly 4,500 years ago.
How heavy are the stones?
The largest sarsens weigh around 25 tonnes or more, and the bluestones several tonnes each.
Did aliens build Stonehenge?
No. Archaeological evidence shows it was built by people.
Can I touch the stones at Stonehenge?
Normally you cannot touch the stones, because they are protected, although during solstice and equinox events and in some special access visits people may be allowed into the circle. Follow the rules at the site and the guidance of staff.
What is a henge?
A henge is a prehistoric earthwork consisting of a circular bank with a ditch inside it. Stonehenge is not a true henge in the strict sense because its ditch lies outside the bank, although the word is widely used.
How were the lintel stones fixed in place?
The builders used carpentry-like joints. Mortise and tenon joints connect the lintels to the uprights, and tongue and groove joints link the lintels to each other, showing that they planned and shaped the stones carefully.
Sources and further reading
Written by
FactNest Editorial Team
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