Sources:
Leonardo da Vinci 'Saint John the Baptist'
Unknown 'Portrait of a young lady'
Jacob Adrianensz Backer 'Portrait of a woman'
Agnolo Bronzino 'Cosimo I de Medici in armour'
Pieter Paul Rubens 'Portrait of King Philip IV'
Jean Siméon Chardin 'Soap Bubbles'
Jacques-Louis David 'Portrait de Madame Raymond de Verninac'
Pieter Dubordieu 'Portrait of a woman
