cannons and mortars in suomenlinna fortress near main entrance - king`s gate

ancient archipelago architecture army artillery battery building cannon cannons coast coastal coastline defence defense defensive entrance finland fort fortification fortress gate gun helsinki historic island king kings kustaanmiekka landscape main military mortal mortar mortars old outdoor protection russian russojapanese scandinavia siege stone stones suomenlinna suomi sveaborg that travel unesco used war water weapon were world