![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/3/3a/Loch_Steinacleit.jpg/640px-Loch_Steinacleit.jpg&w=640&q=50)
Dun (fortification)
Type of ancient or medieval fort in Britain and Ireland / From Wikipedia, the free encyclopedia
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A dun is an ancient or medieval fort. In Great Britain and Ireland it is mainly a kind of hillfort and also a kind of Atlantic roundhouse.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/3/3a/Loch_Steinacleit.jpg/320px-Loch_Steinacleit.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/0/0b/Castle_of_Dunamase_im_Abendlicht_02.jpg/640px-Castle_of_Dunamase_im_Abendlicht_02.jpg)