Francesco Tiradritti, a professor at the Kore University of Enna who serves as director of the Italian archaeological mission to Egypt, has dropped a bombshell: He believes “Meidum Geese” was most likely painted not during the 4th dynasty of ancient Egypt, but in the 19th century, reports History.org.

In 1871, Luigi Vassalli claimed he discovered the painting in a tomb near the Meidum Pyramid, built by the pharaoh Snefru around 4,500 years ago.

Since then, the painting has been compared to Leonardo da Vinci’s "Mona Lisa." But recent analysis by Tiradritti calls into question the date and authenticity of the famed work.