Ключевые слова: allies, architecture, armed, army, attraction, background, balkans, belgrade, beograd, building, cannon, cannons, citadel, equipment, europe, exhibition, exterior, first, fort, fortress, green, gun, guns, heavy, historical, history, kalemegdan, landmark, military, museum, old, outdoor, panzer, power, retro, second, serbia, summer, tank, technology, tourism, travel, vacation, vehicle, vehicles, vintage, war, warfare, weapon, world,