the main of suomenlinna - kuninkaanportti king`s gate - the principal entrance to the fortress

adolf ancient architecture baltic bastion bridge building concave culture drawbridge entrance facade finland fort fortification fortress frederick gate helsinki heritage history iconic island king kuninkaanportti kustaanmiekka landmark limestone main marble masonry military monument nordic old principal ruin rustic stairs stairway stone strait suomenlinna suomi surface sveaborg symbol texture travel unesco wall