An easter egg is an intentional hidden message, in-joke or feature in an object such as a movie, book, CD, DVD, computer program, web page or video game.
Leonardo da Vinci anticipated this fun and current practice in one of his most famous painted work.
Mona Lisa, also named with strange coincidence with the in-joke aspect "La Gioconda" hides something...
Discover what by yourself dragging the portrait...
