The Mona Lisa by Leonardo da Vinci is the best-known masterpiece of art in the world, and one of its most distinctive traits is her subtle smile. To help her maintain that famous smile while he was doing the painting, it is believed that Leonardo hired entertainers to keep Mona Lisa in a good mood, as, allegedly, she was a rather difficult woman. Apparently, during Leonardo’s time, they didn’t have smartphones or funny YouTube videos that he could have used to amuse her to keep her in a good mood. Photographs were also not very popular back then – because […]