At Knap of Howar on the Orkney island of Papa Westray, a Neolithic farmstead has been wonderfully well preserved, and is claimed to be the oldest preserved stone house in northern Europe, with radiocarbon dating showing that it was occupied from 3500 BC to 3100 BC.
Knap of Howar
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By LancelotLink @ 2010-08-16 10:21:03