The Mona Lisa or "La Gioconda"
oil on walnut panel
34 x 30 inches (86.36 x 76.20 cm)
Provenance : J Bamford, Christies sale, March 1841, lot 85
Exhibited : Westham Picture exhibition, london, March 1895

The 16th-century portrait Mona Lisa, or La Gioconda (La Joconde), painted in oil on a poplar panel by Leonardo da Vinci, has been the subject of a considerable deal of speculation.
It has for a long time been argued that after Leonardo's death the painting was cut down by having part of the panel at both sides removed. Early copies depict columns on both sides of the figure. Only the edges of the bases can be seen in the original. However, some art historians, such as Martin Kemp, now argue that the painting has not been altered, and that the columns depicted in the copies were added by the copyists. The latter view was bolstered during 2004 and 2005 when an international team of 39 specialists undertook the most thorough scientific examination of the Mona Lisa yet undertaken. Beneath the frame (the current one was fitted to the Mona Lisa in 2004) there was discovered a "reserve" around all four edges of the panel. A reserve is an area of bare wood surrounding the gessoed and painted portion of the panel. That this is a genuine reserve, and not the result of removal of the gesso or paint, is demonstrated by a raised edge still existing around the gesso, the result of build up from the edge of brush strokes at the edge of the gesso area.The reserve area, which was likely to have been as much as 20 mm originally appears to have been trimmed at some point probably to fit a frame (we know that in the 1906 framing it was the frame itself which was trimmed, not the picture, so it must have been earlier), however at no point has any of Leonardo's actual paint been trimmed. Therefore the columns in early copies must be inventions of those artists, or copies of another (unknown) studio version of Mona Lisa.

People of Arezzo in the Val di Chiana, a valley in Tuscany, have traditionally claimed the Mona Lisa landscape as theirs. An article published in the journal Cartographica suggests that the landscape comprises two parts which when placed together correspond to Leonardo’s topographic map, the Val di Chiana.

It has been suggested that Leonardo created more than one version of the painting. The owners of the version known as the Isleworth Mona Lisa claim that it is an original, though the great majority of art historians believe it to be a later copy by an unknown artist. The same claim has been made for a version in the Vernon collection. The Vernon Mona Lisa is particularly interesting because it was originally part of the collection at the Louvre. Another version, dating from c.1616 was given in c. 1790 to Joshua Reynolds by the Duke of Leeds in exchange for a Reynolds self-portrait. Reynolds thought it to be the real painting and the French one a copy, which has now been disproved. It is, however, useful in that it was copied when the original's colors were far brighter than they are now, and so it gives some sense of the original's appearance 'as new'. It is in a private collection, but was exhibited in 2006 at the Dulwich Picture Gallery. There are also copies of the image in which the figure appears nude. These have also led to speculation that they were copied from a lost Leonardo original depicting Lisa naked.In January 2012 Museo del Prado in Madrid announced that it had discovered and almost fully restored a copy of the painting by a pupil of Leonardo, very possibly painted alongside the master. The copy gives a better indication of what the portrait looked like at the time, as the varnish on the original has become cracked and yellowed with age.
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