A trumeau mirror or pier glass is a wall mirror originally manufactured in France in the 18th century. It takes its name from the French word trumeau, which designates the space between windows. In England it is normally known as a ‘pier glass‘.
Trumeau mirrors were originally intended to hang on a wall between windows, providing a decorative element and bringing more light to the room. Most antique trumeau mirrors are highly ornate and often gilded.
The mirror is almost always rectangular and sometimes includes a decorative portion at the top, with the mirror below it. Those designed to be placed above a mantelpiece, rather than between windows, could have candles placed in front of the mirror to increase ambient light.