By Gospatric, Earl of Northumbria, built 1070.
Dunbar Castle was one of the strongest fortresses in Scotland, situated in a prominent position overlooking the harbour of the town of Dunbar, in East Lothian. Several fortifications were built successively on the site, near the English-Scottish border. The last was slighted in 1567; it is a ruin today.
From Wikipedia, CC BY-SA 4.0.
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