Below the trapdoor, some stairs led to a long room that appeared to be more than just storage space.
In 1975, while searching for a new way for tourists to exit, Dan Poggetoo, then director of the Medici Chapels museum in Florence, discovered a hidden trapdoor beneath a wardrobe.
Dal Poggetto and his colleagues found, on the walls, what they say it can be a charcoal and chalk drawing from the hand of Michelangelo.
Actually the room is closed to the public to protect the artwork.
Is possible that the rarely seen drawings on the walls may have been created by Michelangelo himself when he went away from the Medici family in 1530.
Source: National Geographic