Masterpieces like The Mona Lisa or The Coronation of Napoleon are admired by tens of thousands of visitors to the Louvre each day. Yet, deep within the Paris museum’s vaults lie thousands more works ...

Over decades and centuries, a painting will be altered by light exposure, air quality, temperature fluctuations and chemical reactions in the paint layers. These factors can cause cracks, ...

Scans of the painting during various stages in its restoration. At left is the damaged piece, with the middle panel showing a map of the different kinds of damage present; green lines show full splits ...

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