Ключевые слова: architecture, art, balkans, blue, building, buildings, built, bulgaria, bulgarian, capital, center, city, classic, closed, column, culture, east, eastern, editorial, entrance, europe, european, exterior, front, historical, ivan, ivan vazov, landmark, national, national theatre, old, opera, red, sky, sofia, sofia bulgaria, sold out, square, stairs, street, structure, theater, theatre, tickets, tourism, tourist, town, travel, tree, vazov,