Ключевые слова: 31, acv, architectural, architecture, august, austria, blue, building, business, center, city, conference, construction, europe, exterior, famous, glass, gold, headquarter, high, historical, history, house, international, landmark, material, modern, nations, office, organization, part, river, sight, skyscraper, summer, sunlight, tall, tourism, tower, town, travel, ultramodern, un, united, uno, unodc, urban, vienna, view, yellow,