outdoor view of kristiansten fortress and cannons over the snow in trondheim

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