Aberedw Castle
Abergavenny Castle
Aberystwyth Castle
Abée Castle
Achalm Castle
Acoz Castle
Afyonkarahisar Castle
Aggstein Castle
Aichelberg Castle
Aizpute Castle
Aizuwakamatsu Castle
Akashi Castle
Akita Castle
Akō Castle
Al-Rahba
Alara Castle
Alberweiler Castle
Alsunga Castle
Alt-Haldenstein Castle
Alt Eberstein
Altdischingen Castle
Altenbaumburg
Altes Schloss (Bad Berneck)
Alton Castle
Alūksne Castle
Ambras Castle
Amsoldingen Castle
Anacopia Fortress
Ankara Castle
Antoing Castle
Anvaing Castle
Aoba Castle
Ardooie Castle
Ardrossan Castle
Aspremont-Lynden Castle
Athlone Castle
Attre Castle