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This category has the following 3 subcategories, out of 3 total.
112:
Buildings and structures in
Northern Ireland by type
8:
122:Military installations in Northern Ireland
7:
117:Military history of Northern Ireland
102:Fortifications in the United Kingdom
33:
22:
14:
77:Tower houses in Northern Ireland
1:
37:Castles in Northern Ireland
138:
107:Fortifications in Ireland
57:Forts in Northern Ireland
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17:Subcategories
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96:Categories
41:(3 C, 2 P)
81:(11 P)
61:(3 P)
98::
79:
59:
39:
70:T
50:F
26:C
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