Ключевые слова: aerial, ancient, architecture, blue, building, cathedral, christian, christianity, church, cross, culture, dome, drone, eastern, famous, god, gold, golden, hermitage, historical, history, holy, kaluga, kaluga region, kozelsk, landmark, male monastery, monastery, old, optina, optina monastery, optina pustyn, orthodox, pustyn, religion, religious, russia, russian, saint, sky, spirit, spiritual, summer, temple, tourism, tower, traditional, travel,