Il cenacolo. [The Last Supper] (1495-1498). Leonardo da Vinci. Santa Maria delle Grazie, Milan. Image courtesy of Wikimedia.
Contrary to Dan Brown, I do not believe that the figure to the Christ's right is Mary Magdalene. It was typical of Renaissance artists to depict the disciple John as young and somewhat effeminate. See also the convincing argument from Leonardo's notebooks and the Bible at Da Vinci Speaks. However, in spite of that, Leonardo may have left us an image of the Magdalene.
Mary Magdalene (c. 1515). Recently attributed to Leonardo da Vinci. Private collection. Image courtesy of Maria Madalena e o Santo Graal.
The above painting was recently attributed as a Leonardo by Carlo Pedretti. Previously regarded as the work of Giampietrino who painted a number of similar Magdalenes. Carlo Pedretti's attribution of this painting is not accepted by other scholars, e.g. Carlo Bertelli, (former director of the Brera Art Gallery in Milan), who said this painting is not by Leonardo and that the subject could be a Lucretia with the knife removed.See also:
. "A lost Leonardo? Top art historian says maybe". Universal Leonardo. Retrieved on 2007-09-27.
. Bertelli, Carlo (November 19, 2005). "Due allievi non fanno un Leonardo" (in Italian). Il Corriere della Sera. Retrieved on 2007-09-27.
"Unseen Da Vinci works go on show," BBC News (15 Oct 2005).
"Mary Magdalene: Edgar Cayce's Da Vinci Painting Found," Gaia Community (18 Jul 2008).