There has been so much debate over the exact date that it was started and completed, that some people even believe that there were two versions of the painting, hoping to explain the discrepancies in varying accounts. Most people generally agree that it was started sometime between the years 1503 and 1506. As for when it was completed, there are varying dates that have been put forward, with most suggesting a timeframe of around 1516. Another painting of the same subject titled Prado’s Mona Lisa (c. 1503 - 1516) - created by the workshop of Da Vinci - was produced simultaneously with the original. Despite being largely ignored as a later copy, it was subsequently recognized as belonging to the artist’s own workshop and hailed for its own beauty and execution. Today, it is exhibited in Museo del Prado in Spain.