The Portland Museum of Art in Portland, Maine, has
a possible "rough draft" of the Mona Lisa. Who knew?
[The painting] was analyzed at the Straus Center for Conservation and Technical Studies at Harvard University. Conservators determined that the painting was executed before 1510—the original Mona Lisa was created between 1503 and 1507—but they were unable to confirm or refute Leonardo’s hand in its creation. However, similarities are remarkable, and the work contains the characteristics of a left-handed brushstroke, consistent with Leonardo’s work as a left-handed artist.
Unlike a forgery or counterfeit work, the Museum’s Mona Lisa, on the basis of technical analyses, differs from the original in size, composition of background landscape, and, most notably, the absence of the enigmatic smile–details which suggest an early study rather than a simple reproduction.