Jarlshof: looking down into a round house | The archaeological site at Jarlshof represents over 4,000 years of continual human habitation. The earliest remains are of Bronze Age buildings from around 2500-2000 BC; Iron Age round houses date from between 200 BC and AD 800; a Viking settlement from the 9th to 14th centuries stands towards the eastern side of the site; and finally the castle, the Laird’s House, stands in the centre of the site and was converted from a medieval farmhouse to a fortified residence in the 1500s. (via Geograph)