ruin of gothic devin castle, bratislava, slovakia

tower tree rock ruins landmark building castle terrain fortification cliff plant hill mountain wall geology monastery landscape ruin devin bratislava gothic architecture stone old ancient fortress fort historic chateau stronghold ruined devín oldest castles likely mentioned written sources 864 louis german besieged prince rastislav wars franks great moravia hand identification based alleged linguistic arguments absence convincing archaeologic evidence evidence important national symbol slovaks featured reverse former 500 czechoslovak koruna banknote halierov coin slovak currency slovakia