Ключевые слова: america, american, americas, architecture, building, building exterior, city, cityscape, cloud covered, cloudy, dawn, day, downtown, early, early morning, hi rise, highrise, light, lighting, low angle view, market square, morning, multistorey building, north america, north american, office buildings, outdoors, overcast, pennsylvania, pittsburgh, public space, skyline, skyscraper, square, stock photograph, street, street life, streetscene, united states, urban, urban life, usa,