Ключевые слова: aircraft, alte, alte oper, am, architecture, art, blue, building, business, city, classic, classicism, concert, culture, day, europe, european, facade, famous, fountain, frankfurt, german, germany, hall, hesse, historic, house, landmark, main, modern, music, old, oper, opera, opera house, opernplatz, outdoor, people, sky, square, street, style, tourism, travel, urban,