Dark family history behind Mona Lisa's sad smile revealed in new book, The Independent

At the age of 15, real-life Lisa Gherardini married Florentine merchant Francesco del Giocondo – who traded in female slaves shipped in from North Africa, authors say

The Dark Secrets Behind the Smiles: Unveiling the Mysterious Mona

Dark Historical Japanese Artworks – Dark Gloomy Art, troll face

Dark family history behind Mona Lisa's sad smile revealed in new

Masterpiece mystery: Mona Lisa isn't 'genuinely' smiling, study

Mona Lisa face based on both male and female models, art detective

mona lisa smile (DVD, 2004) Kirsten Dunst, Julia Roberts -Like New

Mona Lisa- The Queen of Mysteries

Portrait painting - Wikipedia

Speculations about Mona Lisa - Wikipedia

Leonardo da Vinci: 10 Facts You Might Not Know