After examining the French artist Paul Gauguin’s The Little Cat with X-ray imaging, experts at the Van Gogh Museum in Amsterdam are unraveling the painting’s secrets—including a hidden beetle.

A gifted self-taught painter, he collected works by his artist friends, including Camille Pissarro, Paul Cezanne, Édouard Manet and Edgar Degas, and exhibited with them. Gauguin’s sympathy with ...

With her book, "The Case of the Disappearing Gauguin," Stephanie A. Brown looks at whether a painting at a Northern California museum was actually created by famed artist.