But it existed even in middle ages;
"The earliest example of archaeological work in Britain can, perhaps, be claimed by monks at Glastonbury Abbey in 1194, where the supposed burial place of King Arthur was found during the rebuilding of the great church after a fire (it was most likely the grave of a former Abbott). A more systematic – and less accidental – approach was taken by John Leland, appointed ‘the King’s Antiquary’ by Henry VIII in 1533 and charged with searching England and Wales for antiquities of all kinds."
file:///C:/Users/justin-work/Downloads/9780387094526-c1.pdf
Nonetheless, to us modern gamers, Stonehenge matters as much as Salisbury. To the middle age people, it was less of a history and more of a life. It probably was depends on each one's religion and culture. Paganism was probably, at least somewhat, stronger than what church historians had recorded.
You are misinterpreting archaeology with antiquarianism and in the former case profiteering of popular mytho's In the Glastonbury abbey case it was a publicity stunt. in the latter case antiquarianism was more collecting historical artifacts than trying to understand who used and built them. Antiquarians collected things as curios and conversation pieces, archaeologists want to learn everything they can about how it was built, why how it was used and what can be said about the people and society of the time from it.
Yes pagan beliefs probably did persist longer than we know but the Sarcen stones were erected sometime between the 26th and 24th centuries BC Stonehenge was abandoned sometime around the 19th century BC and the absolute earliest the Celts could have arrived in Britain based on archaeological evidence is the 12th century BC, if you wanted a great wonder for Celtic paganism Anglesea is much much better as it at the least a site of religious importance to the Bythonic Celts.
Add onto that that the genetic data shows a large scale population turnover in Britain not long before Stonehenge was abandoned to the tune that the modern ethnic British people are ALL descended from a common ancestral group of Central Asian origins in the male line and only about 10% of the matrilinial DNA is from the pre turnover population. What ever cultural continuum created Stonehenge was almost completely wiped out and coincides with its abandonment.
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