There's a painting of a burning town made from actual ashes - Apparently.
The painting, "The Rue Transnonain, after the Massacre" by French artist Gustave Courbet, was created in 1834 using real ashes from the street where a massacre had taken place. Courbet incorporated the ashes into the painting's surface, creating a textured, three-dimensional effect. This innovative technique, known as "pāte grave," added to the painting's eerie, realistic depiction of the burning town. The painting is now considered a masterpiece of 19th-century art and is housed at the Art Institute of Chicago.