Ключевые слова: architectural, architecture, bricks, byzantine, byzantium, castle, constantinople, construction, culture, empire, european, famous, fortification, fortified, gate, heritage, historic, historical, history, istambul, istanbul, lapse, medieval, roman, roman empire, ruins, stone, symbol, theodosian, theodosius, tourism, tower, travel, turkey, turkish, unesco, walls, walls of constantinople,