Ключевые слова: aerial, aerial imagery, aerial photo, aerial photography, anchor square, architecture, attraction, blue, cathedral, christianity, church, city, day, historical, historical center, history, kronstadt, landmark, landscape, may, morning, naval, old, orthodox, petersburg, religion, russia, saint, saintpetersburg, sky, spring, square, st nicholas, st nicholas cathedral, st petersburg, sunny, temple, top view, town, urban, view,