How do I spot an 18th-century mirror?

Authentic 18th-century pieces display hand-carved wooden frames beneath the gesso rather than moulded composition ornament. They frequently house original mercury glass plates with natural foxing. Examining the construction of the reverse timber frame reveals hand-cut joins and older fixings consistent with period cabinetmaking rather than later revival production.

What is a trumeau mirror?

A trumeau is an architectural mirror featuring an upper panel decorated with a painted scene or decorative carving. These pieces were designed to match interior wall panelling. Originating in grand French interiors, they functioned as permanent wall fixtures above fireplaces or between windows.

How do I hang a heavy gilt mirror?

Large giltwood and gesso mirrors require substantial wall fixings anchored directly into masonry or heavy wall studs. Using a professional mirror-hanging cleat distributes the considerable weight safely. Avoid relying solely on decorative top rings attached to the frame, as these can fail under the weight of the timber and glass.

What causes foxing on old mirrors?

Foxing occurs when moisture penetrates behind the glass plate and reacts with the backing amalgam, creating dark spots and clouding. This chemical process develops naturally over many decades. Many collectors prize foxing as a sign of authenticity and age that proves the glass plate is original to the frame.