Ключевые слова: 1917, architecture, army, artillery, aurora, avrora, battleship, boat, cannon, city, clouds, cruiser, europe, heritage, history, landmark, marine, memorial, military, monument, museum, navy, neva, old, outdoor, petersburg, revolution, river, russia, saint, ship, sightseeing, sky, st, summer, symbol, tourism, transportation, warship, water, weapon,