Ключевые слова: architecture, background, black, blackboard, blank, blocks, board, brick, building, cement, chalk, chalkboard, concrete, construction, copy space, element, exterior, floor, flooring, grain, granite, gray, grid, ground, hard, marble, material, natural, nature, paper, pattern, road, rock, rough, rugged, schist, slab, slate, solid, square, stone, stonewall, structure, stucco, surface, textured, tile, tiling, wall, wallpaper,