Ключевые слова: amphitheater, amphitheatre, architecture, background, belem, building, center, centre, centro, charles, cityscape, contemporary, correa, decoration, design, europe, exterior, famous, foundation, garden, gray, investigation, landmark, lisbon, marble, minimal, modern, monument, o, outdoor, outdoors, para, portugal, public, research, river, science, scientific, seats, stage, stairs, stone, tagus, tejo, tranquility, tree, unknown, urban, white, window,