Dunnideer Castle is a ruined tower house near Insch, Aberdeenshire, Scotland. Built around 1260, it reused stone from an earlier prehistoric vitrified hillfort dating to approximately 250 BC. The tower measured 15 by 12.5 metres (49 by 41 ft) with walls 1.9 metres (6.2 ft) thick, likely featuring a first-floor hall and multiple stories.[1]

https://en.wikipedia.org/wiki/Dunnideer_Castle

Vitrified forts are stone enclosures whose walls have been subjected to vitrification through heat.[1] It was long thought that these structures were unique to Scotland, but they have since been identified in several other parts of western and northern Europe.

https://en.wikipedia.org/wiki/Vitrified_fort

But now, people can see how the ancient fortification would have looked – thanks to a founding member of Pink Floyd.

Musician and renowned artist Clive Metcalfe has painstakingly recreated Dunnideer Castle in scale form.

https://www.pressandjournal.co.uk/fp/past-times/6441272/dunnideer-castle-insch-museum/