Chiaroscuro joins two Italian words, chiaro for light and scuro for dark. In a chiaroscuro painting, light models the forms an outline used to draw. What the light misses stays unreadable.
One source lights a dark room. The painter decides how far it reaches, and so which face you read first.
Around 1600, Italian painters pushed the contrast so far that the dark became part of the subject. That's tenebrism. It reached France and the Dutch Republic within a generation.
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I kept a painting if it passes one of two tests. The painter placed the light source on purpose, in the frame or just outside it. Or the handling of dark changed how painters worked afterward. Some pass both.
10. Rembrandt, The Night Watch (1642)
The shadow of an open hand falls across a pale gold coat, near the center of a canvas almost four meters tall and four and a half meters wide.
The hand belongs to Captain Frans Banninck Cocq. He is the officer in black, leading a company of the Amsterdam civic guard forward out of a dark archway. Rembrandt finished the picture in 1642. It hangs today in the Rijksmuseum in Amsterdam.
The coat under the shadow belongs to Lieutenant Willem van Ruytenburch, the captain's second in command. The Rijksmuseum points to that shadow as the detail that tells you which direction the light is falling from.
Conservation scientists at the museum published a study of the lieutenant's costume in 2025. They recorded exactly where the shadow lands, on an embroidered lion holding the crowned arms of the city of Amsterdam.
That study also measured how Rembrandt built the lit parts of the coat. He started with a rough underpaint of lead white mixed with smalt, a ground blue glass that adds body to the paint and speeds up drying.
In the brightest passages that layer alone stands up off the canvas by as much as 850 micrometres, close to a millimetre of paint. Over it he loaded lead white and lead tin yellow in strokes thick enough to keep the ridge of the brush.
The shadowed folds of the same coat got the opposite treatment. There the paint is thin, smooth and half transparent. The dominant pigment in it is yellow earth. The lit side of the coat is raised paint, the shadowed side a thin film of it.
The gold thread on that coat posed a problem no white pigment solves on its own.
A second Rijksmuseum team reported in 2024 that it had identified two arsenic sulphides in the lieutenant's doublet sleeves and buff jerkin, pararealgar and a semi amorphous form of the same mineral. Rembrandt mixed them with lead tin yellow and vermilion to build an orange.
The study notes that arsenic pigments are not part of the palette usually associated with Rembrandt. It concluded the choice was deliberate and not the result of a pigment degrading over three centuries.
Rembrandt applied the same logic to everyone else in the company. The Rijksmuseum states the rule plainly: the important men were placed in the light and the minor ones in the shade.
Thirty four figures fill the canvas and only a few of them are fully lit. One is a girl in pale yellow moving through the crowd, with the claws of a dead bird hanging at her waist, the emblem of the Kloveniers militia that ordered the painting.
Members paid roughly a hundred guilders each toward it. Paying did not buy equal light. Only eighteen of the figures are portraits of actual members of the company.
The picture then darkened on its own. Layer after layer of varnish yellowed over the next century and a half, until the scene read as night. The title The Night Watch was first recorded in 1797, and it stuck. Restorers stripped the varnish in the 1940s and found daylight underneath.
The girl in yellow is the figure to watch. She isn't a member of the company, and she gets more light than most of the men who paid to be in the picture.
Rembrandt's way of letting light fall away across a face left portrait photographers a term they still use. Rembrandt lighting means a small triangle of light on the shadowed cheek, made by a lamp set high and roughly forty five degrees to one side.
At a Glance
Artist: Rembrandt van Rijn (1606 to 1669)
Made: 1642, according to the Rijksmuseum.
Medium: Oil on canvas. 379.5 by 453.5 cm.
Where to see it: Rijksmuseum, Amsterdam (object number SK C 5)
FAQ
Where was The Night Watch during World War II?
The Night Watch spent the war in hiding. In 1939 it was taken off its stretcher, rolled up and moved out of Amsterdam, and from 1942 it was kept in a shelter in the Sint Pietersberg caves near Maastricht. It went back on display at the Rijksmuseum after the war.
Was The Night Watch originally bigger than it is today?
The Night Watch was cut down on three sides, mainly the left, in 1715, according to the Rijksmuseum. It was moving from the Kloveniersdoelen guild hall to Amsterdam's Town Hall and had to fit between two doors there. A seventeenth century copy of the full composition by Gerrit Lundens shows what the original looked like.
Has anyone ever damaged The Night Watch?
The Night Watch has survived several attacks. In 1975 a visitor slashed the canvas with a bread knife, and conservators repaired it by stitching the cuts, adding a new linen backing and retouching the damage. The Rijksmuseum says the painting has also survived acid damage.
9. Rembrandt, Belshazzar's Feast (about 1636 to 1638)
A block of glowing Hebrew letters hangs in the dark above a banquet table. A king twists round in his seat to look at it. Rembrandt painted this in Amsterdam, some time around 1636 to 1638. It hangs in the National Gallery in London. The king is Belshazzar, the ruler of Babylon in the fifth chapter of the Book of Daniel.