Ключевые слова: architecture, background, building, business, city, concept, concrete, construction, daily, design, detail, down, exterior, forward, grey, growth, hall, handrail, high, industrial, leadership, metal, modern, nobody, outdoor, outdoors, outside, pattern, perspective, rise, sky, stair, staircase, stairs, stairway, start, steel, step, stone, straight, street, structure, symmetrical, up, upstairs, upward, upwards, urban, wall, way,