Article: How to Read Signatures and Inscriptions on Antique Paintings

How to Read Signatures and Inscriptions on Antique Paintings

To view our collection of antique paintings
Part of our practical guides for collectors in our Collecting Guides. See also our guides to Understanding Condition and Old Master Copies.

The first thing almost everyone does with an old painting is hunt for the signature. It is the right instinct pointed at the wrong certainty: a signature is a clue, not a verdict. Plenty of masterpieces are unsigned; plenty of forgeries are signed beautifully. This guide explains where to look, how to read what you find, and what signatures can and cannot tell you.

Where to Look

Start with the corners: lower right first, then lower left, the two conventional positions since the 17th century. Then widen the search. Painters signed on steps, ledges, rocks, the pages of painted books, the edge of a table, a scrap of painted paper (the trompe-l'oeil cartellino of Italian tradition), even along the blade of an oar. Degas signed one famous cafe scene on a newspaper lying on the table. Raking light, a flashlight held at a low angle to the surface, reveals signatures that have sunk into darkened varnish. Look at the stretcher and the back of the canvas too: inscriptions, old labels and stamps on the reverse are often more informative than anything on the front.

Reading What You Find

Full signatures establish the claim most strongly, especially when they match documented examples of the artist's hand. Signature dictionaries and auction archives exist precisely for this comparison.

Initials and monograms were common, and whole reference works are devoted to decoding them. A monogram narrows the field rather than settling it: combined with style, school and date, it can lead to a firm identification.

Dates beside a signature are small treasures: they anchor the painting in a career and a moment. A date alone, without a name, still tells you when, which is half of any attribution.

Inscriptions go beyond the name: dedications ("a mon ami..."), sitters' names on portraits, titles on the reverse, exhibition numbers in chalk. Each is a thread of provenance. French inscriptions on the stretcher, old Salon labels, supplier stamps of Parisian color merchants: these humble marks can localize and date a canvas with surprising precision.

The Signature That Is Not by the Artist

Now the necessary caution. Because buyers overvalue signatures, history has supplied them generously. There are three cases to know.

Later attributions: a dealer or owner in the past added the name they believed (or hoped) was correct. Common, often in a different paint that sits on top of the aged varnish rather than under it.

Strengthened signatures: a genuine but faded signature retraced by a restorer. Half honest, half problem: the underlying claim may be true, but the evidence has been overwritten.

Fraudulent signatures: a famous name added to an honest period painting by another hand. The painting is old; the name is the lie. This is why a signature that sits crisply on top of craquelure, instead of cracking with the paint around it, is the classic red flag: a signature applied at the time of painting ages with the painting.

Professionals check signatures under magnification and ultraviolet light, exactly as they check restoration, and our condition guide explains what UV reveals. When we catalog a painting as signed, that examination stands behind the word.

The Unsigned Painting

Here is the reframe that experienced collectors make early: before the 19th century, signing was the exception, not the rule. A workshop's output was the master's product whether or not he wrote his name; guild practice, patron relationships and the painting's documented history did the work a signature does today. This is why Old Master attribution rests on style, technique and provenance, and why the attribution vocabulary (attributed to, studio of, circle of, follower of, after) exists at all. We explain that vocabulary rung by rung in our pillar guide to 18th-century French portraits.

Practically, this means an unsigned 18th-century painting is completely normal, and often better value: the market pays a visible premium for a name on the front, while the quality of the painting itself is unchanged. The same logic drives our guide to portraits of unknown sitters. From the 19th century onward, by contrast, signing became standard professional practice, and for paintings of that era a signature is reasonably expected and adds documented value, which is why we photograph and describe the signature on every signed work we sell.

A Five-Minute Method

When a painting comes into your hands: check the corners, then sweep the whole surface in raking light; turn it over and photograph every label, stamp and inscription on the reverse; note whether any signature cracks with the surrounding paint; write down exactly what the marks say, letter by letter, including what you cannot read. Those five minutes of looking, done before any conclusions, are the foundation everything else builds on, whether the painting came from an auction, an attic or an inheritance.

Browse Our Paintings