Ключевые слова: abstract, architecture, building, business, capital, city, cityscape, construction, contemporary, cuatro torres, cuatro torres business area, curtain wall, curved, design, detail, development, district, downtown, downtown district, economy, europe, facade, finance, financial district, futuristic, glass, investment, madrid, modern, new, no people, office, sky, skyscraper, spain, technology, tower, travel, urban,