 Scan data obtained in 2004 suggested that the painting dated from around 1503 and commemorated the birth of the Giocondo's second son.In 2011, art historian Silvano Vinceti claimed longtime apprentice (and possible male lover) to Leonardo, Salaì, was the inspiration and figure for the painting.In 2005 Heidelberg University academics discovered notes scribbled into the margins of a book by its owner in October 1503.