Abstract: The invention comprises an assembleable mantelpiece, which includes a mantel, a pair of side members, and means for positioning and securing the mantel and pair of side members relative to each other and relative to a fireplace, so as to enable the mantelpiece to be manufactured, shipped and stored disassembled, and assembled and installed relative to a fireplace conveniently and efficiently, without subjecting the mantelpiece to possible damage resulting previously from installation thereof, and without requiring finishing necessary previously as a consequence of such installation thereof.