Abstract: Modular shelving for window displays comprises angled beams, at 45 degrees to the horizontal, and small horizontal shelves set on the beams. The shelves are to hold individual plants or the like. The beam ends are cut at 45 degrees, the cuts either parallel or at right angles to each other on a beam. The ends are adapted to be joined by dowels at either right or straight angles. Thus the beams may be combined in various plane configurations to form a diamond shape, W-shape, X-shape, zig-zag, and so on; the plants or items may then be arranged upon the small shelves on the beams in similar figures for window display. The weight of the structures is borne by support poles with feet. The support poles are of two lengths, the shorter being half the length of the longer; the shorter poles have a length equal to one half of the beam length, divided by the square root of two. The longer are double that length.