The Lucan portrait of Leonardo da Vinci is a late 15th- or early 16th-century portrait of a man. The picture was discovered in 2008 in a cupboard of a private house in Italy.
In composition, it strongly resembles a portrait of Leonardo da Vinci held by the Uffizi Gallery and is generally believed to be a 19th century forgery. In size, style and medium it resembles a portrait of Leonardo by Cristofano dell'Altissimo, painted posthumously for the Medici and also held by the Uffizi. The painting was previously thought by its owners to represent Galileo but on its discovery a claim was made that it is a self-portrait by Leonardo da Vinci. Alessandro Vezzosi, director of the Museo Ideale Leonardo da Vinci at Vinci, said in 2011 that he had excluded the possibility that it was a self-portrait but that the painting "remains intriguing because it adds a new element to the Leonardo puzzle".