Most mirrors are hung to be looked into. A concave mirror asks to be looked at.
Its surface dishes gently inwards, and that shallow bowl does something flat glass never can: it takes the room and reorders it. Stand close and your reflection swells, soft-edged and faintly unreal. Step back and the whole room turns over — furniture, windows, the person crossing the doorway, all inverted and condensed into a small luminous world suspended inside the frame. It is the nearest thing wall décor has to a party trick, and unlike most party tricks it does not wear thin. Guests find them, without fail, within about four minutes of arriving.
Not Simply a Mirror That Curves the Wrong Way
The distinction matters. A convex mirror — the great obsession of Regency drawing rooms, and still the most collectable of the three — bulges outwards and pushes the room away, gathering an entire interior into a small, distant, jewel-like scene. It is the reason a girandole mirror above a chimneypiece can make a modest sitting room read as a stage set.
A concave mirror does the opposite. It draws light and image inward, gathering rather than scattering. Come within its focal length and the reflection magnifies; go beyond it and the image tips upside down and shrinks. That focal point, on a large shallow dish, may sit several metres out into the room, which means a single mirror will behave quite differently to someone standing at the sofa and someone standing in the doorway. The reflection is never fixed. It changes as you cross the floor, which is precisely the appeal.
Where to Hang One
Above a chimneypiece. The traditional position, and still the best. A concave mirror over a fire surround holds a room the way a painting does, but with the advantage of movement — firelight caught in a dished surface is genuinely lovely, softened and drawn to a point rather than flatly bounced.
In a hallway. Narrow entrance halls are the hardest rooms in the house and the ones that benefit most. Hung at the far end, a large concave mirror gives a corridor somewhere to go. Keep the console beneath it sparse: one lamp, one bowl, nothing that competes.
In the dining room. Candlelight and a curved mirror are an old and reliable pairing. The flames are gathered and multiplied rather than merely repeated, and a dark-panelled or deeply painted wall behind will do far more for the effect than a pale one.
In a bedroom. Above a chest of drawers rather than above the bed, where the inverted reflection becomes rather more of a presence than most people want at 3am. Opposite a window is the obvious move; see the caveat below before you make it.
The Caveat Nobody Mentions
Because a concave mirror concentrates light rather than dispersing it, one hung in the path of direct sun can throw a genuine hot spot — enough to scorch a curtain, a linen sofa arm or a book jacket left in the wrong place. The effect is strongest with a deeper curve and a larger diameter. Hang it where it catches reflected daylight, or set it off-axis from the window rather than square opposite. This is a five-minute consideration that saves an upholstery bill, and it is the one thing worth checking before the fixings go in.
Frames, and the Case for None
The frame decides whether the mirror reads as sculpture or as furniture.
Antiqued brass and aged bronze suit period rooms and take the curve into slightly ecclesiastical territory, which is no bad thing. Blackened steel is the industrial choice — good against brick, plaster and raw timber, and unfussy enough not to argue with the shape itself. Turned or limed timber softens everything and belongs in coastal and country houses. And a frameless disc, its edge polished to a bevel, is the most modern option and the most demanding: it needs a clean wall and real space around it, or it simply looks like something waiting to be hung properly.
Whatever the finish, resist the urge to build a gallery wall around it. A concave mirror is not a component in an arrangement; it is the arrangement. Give it a generous margin of empty wall and let the reflection do the decorating.
Why They Endure
Decorative mirrors have survived every cycle of taste since the eighteenth century because they are one of the few objects that are simultaneously useful, sculptural and free — they cost nothing to run and never need rearranging. The concave form has simply been the least fashionable of the three for a long while, which makes it, at present, the most interesting.
Buy one large enough to look deliberate. A small concave mirror is a curiosity; a large one is a decision.
