EntityQ1291082· pop 7· linked from 14 articlesArdencaple CastleSign in to saveformer castle near HelensburghConnectionsUnited StatesCountryWorld War IIConceptScotlandEntitygeographic coordinate systemEntityInternational Standard Book NumberEntityScottish GaelicEntitytoponymyEntityRoyal NavyEntityshorthandEntityArgyll and ButeEntityRobert AdamEntityFirth of ClydeEntityHelensburghEntitylisted buildingEntityJohn Campbell, 9th Duke of ArgyllEntityturretEntityHMNB ClydeEntitybay windowEntityGeorge Campbell, 8th Duke of ArgyllEntityHistoric ScotlandEntityCategoriesCastles in Argyll and ButeCategory B listed buildings in Argyll and ButeCategory B listed lighthousesClan CampbellClan MacAulayDemolished buildings and structures in ScotlandHelensburghLighthouses in ScotlandListed castles in Scotland