Simplistic minimalistic black and white stair case lit by natural light from near by large windows which overlook the city empty exit apartment safety windows route abstract, architecture, background, blank, bright, building, business, city, concept, concrete, copy space, design, empty, entrance, exit, fire, glass, home, house, indoor, inside, interior, light, marble, metal, minimal, modern, new, nobody, office, pattern, perspective, railing, simple, sky, stair, staircase, stairs, stairway, steel, step,