's-Gravenwezel Castle

Belgium

's-Herenelderen Castle

Belgium

't Hooghe Castle

Belgium

(''Kasteel de Merode'')

Belgium

Aalborghus Castle

Denmark

Aalholm Castle

Denmark

Abaúj Castle

Hungary

Abbasabad (fortress)

Azerbaijan

Abbiategrasso

Italy

Abdanan Castle

Iran

Abreha Castle

Ethiopia

Absalon's Castle

Denmark

Abuș

Romania

Abyaneh

Iran

Achala Fort

India

Achalgarh Fort

India

Acker Castle

Belgium

Acoz Castle

Belgium

Acqui Terme

Italy

Acri

Italy

Acrocorinth

Greece

Ancient/Byzantine period

Acronauplia

Greece

Ancient/Byzantine/Frankish/Venetian period

Ada Kaleh

Romania

Adamovich-Cseh Castle

Croatia

Adamović-Mihaljević Castle

Croatia

Adhai Din Ka Jhonpra

India

Adilabad Fort

India

Adoni Fort

India

Adorno Castle

Italy

Aegina

Greece

Afyonkarahisar Castle

Turkey

HittitesSeljuks

Agazzano

Italy

Agazzano Castle

Italy

Agena Castle

Japan

Agha Khan Liravi-ye Castle

Iran

Aghireșu

Romania