Stonehenge is a prehistoric stone circle on Salisbury Plain in Wiltshire, England, built in several stages between roughly 3000 and 1500 BC — making its main structure around 4,500 to 5,000 years old. Its largest stones, the sarsens, weigh up to 25 tonnes each, while the smaller bluestones were transported some 240 kilometres from the Preseli Hills in Wales. A UNESCO World Heritage Site since 1986, Stonehenge is aligned with the sunrise on the summer solstice and the sunset on the winter solstice.
Introduction
Stonehenge is one of the most famous and mysterious monuments on Earth, standing on the open grassland of Salisbury Plain about 13 kilometres north of Salisbury in Wiltshire, southern England. Its instantly recognisable ring of standing stones, some capped with horizontal lintels, has drawn visitors, scholars, and pilgrims for centuries. Yet despite generations of study, no one knows for certain exactly why it was built.
What makes Stonehenge remarkable is not only its great age but the extraordinary effort required to build it. Working with stone, antler, and bone tools, Neolithic and early Bronze Age communities quarried, hauled, shaped, and raised enormous blocks of stone with a precision that still impresses engineers today. The result is the most architecturally sophisticated prehistoric stone circle in the world.
History & Origins
Stonehenge was not built all at once. Archaeologists recognise several major phases of construction spread across roughly 1,500 years, reflecting the changing beliefs and abilities of the people who used the site.
- Around 3000 BC: The first monument was a circular earthwork — a bank and ditch enclosing a ring of pits known as the Aubrey Holes.
- Around 2500 BC: The great sarsen stones were raised, along with the arrival of the smaller bluestones from Wales.
- Around 2000–1500 BC: The bluestones were rearranged more than once into the settings visible today.
The site sits within a much larger prehistoric landscape rich in burial mounds, ceremonial avenues, and other monuments such as nearby Durrington Walls. Excavations have revealed cremated human remains buried at Stonehenge, suggesting it served, at least in part, as a place for the dead and for ancestral rituals.
How It Was Built
Building Stonehenge was an immense undertaking for a society without metal tools, wheels, or draught animals in widespread use. The two main types of stone came from very different places and posed very different challenges.
The sarsen stones
The largest stones are sarsens — hard blocks of silcrete sandstone. Recent geochemical analysis has traced most of them to West Woods, near Marlborough, about 25 kilometres north of the site. The biggest sarsen, the Heel Stone, weighs around 30 tonnes, and the upright stones of the great trilithons weigh up to 25 tonnes each. They were probably dragged on wooden sledges and rollers by large teams of people.
The bluestones
The smaller bluestones, weighing 2 to 4 tonnes each, are far more exotic. They were quarried in the Preseli Hills of west Wales and transported roughly 240 kilometres — one of the most astonishing feats of prehistoric Europe. Whether they travelled overland, by raft along rivers and coasts, or a combination of both is still debated.
Joining the stones
The builders used woodworking techniques in stone. The horizontal lintels were held in place with mortise-and-tenon joints, and the curved lintels of the outer circle were locked together with tongue-and-groove joints, forming a continuous ring high above the ground.
Dimensions & Key Facts
- Age: Main structure built around 2500 BC; earliest earthworks around 3000 BC
- Sarsen circle diameter: About 33 metres (108 feet)
- Tallest stone: The Heel Stone stands about 4.7 metres (16 feet) above ground
- Heaviest stones: Sarsens up to around 25–30 tonnes
- Bluestone source: Preseli Hills, Wales — roughly 240 km away
- Status: UNESCO World Heritage Site since 1986
Originally, the outer sarsen circle consisted of 30 upright stones topped by 30 lintels, with five towering trilithons arranged in a horseshoe inside. Many stones have since fallen or been removed over the millennia, but enough survives to reveal the monument's original geometry.
Solstice Alignment
One of Stonehenge's most celebrated features is its alignment with the sun. The main axis of the monument points toward the sunrise on the summer solstice — the longest day of the year — and, in the opposite direction, toward the sunset on the winter solstice, the shortest day.
Standing at the centre on the morning of the summer solstice, an observer sees the sun rise close to the Heel Stone. Many archaeologists now believe the winter solstice alignment may have been even more important to the builders, tied to the death and rebirth of the year. Thousands of people still gather at the stones each solstice to watch the sunrise.
Cultural Significance
For the Neolithic and Bronze Age communities who built it, Stonehenge was likely a temple, a place of ceremony, healing, and burial, and perhaps a giant calendar marking the turning of the seasons. Its precise purpose remains one of archaeology's enduring questions.
In later centuries the monument gathered myths and legends, from associations with the wizard Merlin to Druids, who are popularly but incorrectly linked to its construction — the Druids arose long after Stonehenge was built. Today the stones are a powerful symbol of Britain's deep past and a focus for modern spiritual movements.
Visiting Today
Stonehenge is managed by English Heritage and welcomes well over a million visitors a year. A visitor centre about 2 kilometres from the stones houses exhibitions and a reconstruction of a Neolithic house, and a shuttle carries visitors toward the monument.
- Access: Visitors normally walk around the stones on a marked path rather than among them
- Special access: Small groups can book early-morning or evening visits inside the circle
- Solstice: Managed open access is offered for the summer and winter solstices
- Nearby: The wider World Heritage landscape includes Avebury, another great stone circle
Common Questions
How old is Stonehenge?
The main stone monument was raised around 2500 BC, making it roughly 4,500 years old, while the earliest earthwork enclosure dates to about 3000 BC — around 5,000 years ago.
Why was Stonehenge built?
Its exact purpose is unknown, but evidence points to it being a ceremonial and burial site as well as an astronomical marker aligned with the solstices.
How were the stones moved?
The sarsens were likely dragged from West Woods about 25 km away, while the bluestones were transported roughly 240 km from Wales using human labour and probably wooden sledges and rollers.
Final Thoughts
Stonehenge endures as a monument to human ambition, ingenuity, and belief. Raised by communities with only the simplest tools, it has stood on Salisbury Plain for thousands of years, outlasting the civilisations that created it and the countless generations who have gazed upon it since. Its silent stones still align with the sun, connecting us to the people who watched those same sunrises five millennia ago.