Bulford timber posts hint at an early Stonehenge prototype

Bulford timber – Excavations at Bulford, about 5 kilometres north-east of Stonehenge, uncovered a wooden monument roughly 500 years older than the start of Stonehenge’s stone circle—aligned with the summer solstice sunrise. Researchers say it may represent an early prototype f

For the first time, researchers say they have evidence that people in Stone Age Britain could capture the movement of the sun.

The claim comes from a discovery near Stonehenge itself: a wooden monument at Bulford. built about 500 years before the stone circle at the famous site began. Stonehenge, on Salisbury Plain in the UK, is already known to align with the summer solstice. Now. the Bulford findings suggest a much earlier version of that idea—where timber. rather than stone. helped mark the turning of the year.

At a press conference announcing the discovery, Phil Harding, who led the excavations for Wessex Archaeology, said, “What we have now, for the first time, is actual proof that these people were capable of capturing the movement of the sun.”

Stonehenge itself was built during the Neolithic, at the very end of the Stone Age. It stands on Salisbury Plain and features an outer ring of vertical sarsen stones topped by horizontal lintels. a smaller inner ring of vertical bluestones. and several other stones. The stones are set within an earth bank and a ditch. The oldest part was built around 3100 BC, with stones placed over the centuries up to 1600 BC. Some standing stones appear to have been aligned so the sun rises on the summer solstice at a specific point on the horizon and sets on the winter solstice at the opposing point. The stones relevant to those alignments were erected about 2500 BC.

Bulford lies about 5 kilometres north-east of Stonehenge, where the UK’s Ministry of Defence wanted to house about 5000 army personnel. Before construction began, Wessex Archaeology excavated Bulford from 2015 to 2017.

The team uncovered a cluster of pits containing grooved ware pottery made by late Neolithic peoples. Radiocarbon dating suggested the pottery was from about 2950 BC, and the researchers obtained 40 dates that were tightly clustered in time. Harding said. “This site was being occupied for a relatively short period of time. ” adding. “It could be something like a decade.”.

A discovery within that short-lived occupation is what drew attention to the sky. Two of the Bulford pits differed from the rest. Instead of vertical sides, they tapered toward the bottom—going from about 1.2 metres across to just 0.5 metres. They also lacked pottery and were filled with chalk rubble. Harding and his colleagues concluded the pits were postholes. once holding timbers a few metres tall. kept upright by the rubble. Charcoal from an ash tree was found in one of the postholes.

The geometry mattered. The two postholes were about 120 metres apart, and Harding realized that a line drawn through them would point roughly north-east at 48.1 degrees—about the direction of the midsummer sunrise. “I got really, really excited about that,” Harding said.

To test the alignment more carefully, Wessex Archaeology recruited Fabio Silva, a skyscape archaeologist at consultancy Stone x Sky. Silva studied the postholes using a 3D reconstruction of the landscape with modern buildings removed. alongside data on the sun’s shifting path across the sky. He determined that the postholes were neatly aligned with the past summer solstice sunrise.

Silva said the alignment was strictly about 1 degree out. But at the press conference. he argued this can make sense because the wooden posts could have been up to 50 centimetres across. In that context. he said the alignment is “bang on.” He added. “The odds of this being by chance are less than 0.5 per cent.”.

The emotional weight of the story isn’t just in the numbers, but in what they imply about planning—about people setting up a visible, annual moment in the landscape using timber long before stone took over.

A. César González-García at the Spanish National Research Council in Santiago de Compostela. who wasn’t involved in the study. said. “Probably a rough orientation is good enough for the ritual that you are supposed to carry out in these sites. ” and added. “It looks like there is a broad understanding and interest in the sky.”.

Other sites in the area already hint at that same relationship between ceremony and sunlight. even if they don’t show the same precision. “From the earliest times that we have Neolithic people present in that landscape. they are incorporating the sun into their ceremonial architecture. ” said Matt Leivers. also at Wessex Archaeology.

Leivers also pointed to “loads of timber monuments” with alignments. suggesting Bulford fits into a wider tradition of wooden ceremonial structures. Greaney. of the University of Exeter in the UK. who wasn’t involved in the study. described the Bulford monument as “a really important Middle Neolithic settlement. ” and said the Bulford work “is adding another one to that. potentially. but much earlier”.

In nearby Larkhill, for example, there is a Neolithic enclosure from around 3700 BC, well before Bulford and Stonehenge. Its entrance faces roughly north-east. Leivers said that if you stand in that entrance and look at Sidbury Hill—the highest point on the horizon—on midsummer morning. “you see the sun rise dead ahead of you over Sidbury Hill.”.

Across the landscape, the picture becomes harder to ignore: Neolithic communities repeatedly shaped their architecture around the sun’s schedule. What changes with Bulford is the timing and the material. A wooden monument—built long before Stonehenge’s stone alignments were erected—may have served as an early prototype. showing that the idea was already in motion centuries earlier than the stones suggest.

Stonehenge Bulford Wessex Archaeology Neolithic summer solstice midsummer sunrise skyscape archaeology archaeoastronomy radiocarbon dating timber monument Salisbury Plain