Many people are still under the impression that Stonehenge was built by the Druids (debunked in this video by Siobhan Thompson). At least as many people think that the modern day stone circle is an undisturbed historical relic, and that the stones are standing today as and where they have for thousands of years. All the way back in 2001, Emma Young did a quick debunking of that theory in New Scientist:
Most of the one million visitors who visit Stonehenge on Salisbury Plain every year believe they are looking at untouched 4,000-year-old remains. But virtually every stone was re-erected, straightened or embedded in concrete between 1901 and 1964, says a British doctoral student.
“What we have been looking at is a 20th-century landscape, reminiscent of what Stonehenge might have looked like thousands of years ago,” says Brian Edwards, a student at the University of the West of England in Bristol.
Stonehenge isn’t the only ancient site to have been transformed in recent years, he says. “Even many of the local people in Avebury weren’t aware that a lot of the stones were put up in the 1930s,” he told New Scientist.
[…]
English Heritage says it is now considering covering the Stonehenge alteration programme in detail in the next edition of its official guidebook to the site. A decision not to include the work in official guides was taken in the 1960s, says Dave Batchelor, English Heritage’s senior archaeologist.
The first restoration project took place in 1901. A leaning stone was straightened and set in concrete, to prevent it falling.
More drastic renovations were carried out in the 1920s. Under the direction of Colonel William Hawley, a member of the Stonehenge Society, six stones were moved and re-erected.
Cranes were used to reposition three more stones in 1958. One giant fallen lintel, or cross stone, was replaced. Then in 1964, four stones were repositioned to prevent them falling.
The 1920s ‘restoration’ was the most “vigorous”, says Christopher Chippindale of the Cambridge University Museum of Archaeology and Anthropology. “The work in the 1920s under Colonel William Crawley is a sad story,” he says.
As I commented on a post back in 2010:
I imagine, given how many times Stonehenge has been mucked about with by earlier enthusiasts, there must be much misleading data has to be sifted and re-sifted before any definite discoveries can be announced. Stonehenge has been fascinating people for centuries and there are probably lots of amateur investigations that may well have made the situation more confusing (think of a sixteenth century equivalent of Indiana Jones or Lara Croft with a nose for treasure).
Atlas Obscura recently had a set of photos of Stonehenge taken in 1867 likely featuring the family of Colonel Sir Henry James, of the Ordnance Survey. There’s also a watercolour by John Constable from around 1835 showing a very different, more ruin-y monument: