| name | image | style | date demolished | type | use | administrative division | continent | date completed | date Start construction | Website | Height (m) | city | Country | latitude (°) | longitude (°) | Original_owner/Owner/Protection | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Carrickfergus Castle |  | Northern Ireland | Europe | 1177 | website | Carrickfergus | United Kingdom | 54.7133000000 | -5.8064500000 | Map | |||||||
| Castle Coole |  | Northern Ireland | Europe | 1798 | 1789 | website | Enniskillen | United Kingdom | 54.3361111111 | -7.6030555556 | National Trust for Places of Historic Interest or Natural Beauty | Map | |||||
| Castle Ward |  | Northern Ireland | Europe | 1760 | website | Strangford | United Kingdom | 54.3666648865 | -5.5666666031 | Map | |||||||
| Florence Court |  | Northern Ireland | Europe | 18th century | website | Enniskillen | United Kingdom | 54.2610000000 | -7.7273100000 | Map | |||||||
| Parliament Buildings (Northern Ireland) |  | Civil/political | Northern Ireland | Europe | 1932 | website | Belfast | United Kingdom | 54.6050000000 | -5.8320000000 | Map |