Ключевые слова: aerial, aerial photography, aerial survey, air photography, architecture, autumn, building, cathedral, christianity, church, city, clouds, day, europe, finland, historical, historical center, house, landmark, landscape, lutheran, many, medieval, north, northern, october, old, porvoo, religion, scandinavia, sky, square, sunny, temple, top view, town, travel, urban, urban development, view, wooden,