Mona Lisa's Identity Confirmed by Document

Jan. 16, 2008 -- The mystery over the identity of the woman behind Leonardo da Vinci's "Mona Lisa" painting has been solved once and for all, German academics at Heidelberg University announced on Tuesday.

Mona Lisa is "undoubtedly" Lisa Gherardini del Giocondo, according to Veit Probst, director of the Heidelberg University Library.

Conclusive evidence came from notes written in October 1503 in the margin of a book.

Discovered two years ago in the library's collection by manuscript expert Armin Schlechter, the notes were made by Florentine city official Agostino Vespucci, an acquaintance of Leonardo da Vinci, in an edition of letters by the Roman orator, Cicero.

In his annotations, Vespucci wrote that Leonardo was working on three paintings at the time, including a portrait of Lisa del Giocondo.

"All doubts about the identity of the 'Mona Lisa' have been eliminated," the university said in a statement.

Vespucci's notes also "establish more precisely the year the painting was done," the university said.

Until now, the only other source to have identified the sitter in Leonardo's masterpiece as Lisa Gherardini, was the 16th century painter and art historian Giorgio Vasari.

In his work "Lives of the Artists," Vasari named Lisa Gherardini, the wife of the wealthy Florentine silk merchant Francesco del Giocondo as the subject of the portrait and concluded that the portrait was painted between 1503 and 1506.

But doubts about Vasari's attribution have always abounded since he was known to rely on anecdotal evidence.

The work is unsigned, undated and bears nothing to indicate the sitter's name. Attempts to solve the mystery surrounding her famous smile as well as her identity have included theories that she was the artist's mother, a noblewoman, a courtesan, even a prostitute.