outdoor view of kristiansten fortress donjon and cannons in trondheim, norway

architecture building cannon cannons castle castleonhill christiansten clouds defense defensive europe european fort fortress fortresscannons fortressnorway fortressonhill hill historic history kristiansten kristianstencastle kristianstenfortress kristianstenfortresscannons kristianstenfortressintrondheim landmark lawn medieval military national nationalflag nationalflagcannons norway norwaycannons norwaycastle norwayflag norwayfortress norwegian norwegiancastle norwegianfortress old oldcastle scandinavia scandinavian stone tourism travel trondeim trondeimwhitefortress trondelag