One of Leonardo da Vinci's Greatest Unsolved Mysteries [8:34]

For more than 500 years, historians have debated the mysteries hidden within this famous Renaissance painting. A remarkable glass rhombicuboctahedron, an unidentified young man, and a strange inscription have led some researchers to question whether Leonardo da Vinci may have played a role in its creation. One of Leonardo da Vinci's Greatest Unsolved Mysteries | 8:34 Secessio | 11.9K subscribers | 79,939 views | June 12, 2026