Ключевые слова: ancient, architecture, building, cathedral, church, colonnade, column, columns, cultural, culture, decoration, design, dome, europe, exterior, facade, famous, granite, heritage, historic, historical, history, isaac, isaak, landmark, leningrad, malachite, monument, neoclassical, old, orthodox, orthodoxy, petersburg, pillars, religion, religious, russian, saint, saint isaacs cathedral, saint petersburg, saintpetersburg, sightseeing, sightseeng, st petersburg, stone, tourism, tourist,