section: History
question: Which year did da Vinci begin the Mona Lisa?
article: Mona Lisa
candidates: Leonardo da Vinci began painting the "Mona Lisa" in 1503 or 1504 in Florence, Italy. Although the Louvre states that it was "doubtless painted between 1503 and 1506", the art historian Martin Kemp says there is some difficulty in confirming the actual dates with certainty. According to Leonardo's contemporary, Giorgio Vasari, "after he had lingered over it four years, left it unfinished". Leonardo, later in his life, is said to have regretted "never having completed a single work". In 1516 Leonardo was invited by King François I to work at the Clos Lucé near the king's castle in Amboise. It is believed that he took the "Mona Lisa" with him and continued to work after he moved to France. Art historian Carmen C. Bambach has concluded that da Vinci probably continued refining the work until 1516 or 1517. On his death the painting was inherited, among other works, by his pupil and assistant Salaì. The king bought the painting for 4,000 "écus" and kept it at Palace of Fontainebleau, where it remained until given to Louis XIV. Louis XIV moved the painting to the Palace of Versailles. After the French Revolution, it was moved to the Louvre, but spent a brief period in the bedroom of Napoleon in the Tuileries Palace. During the Franco-Prussian War (1870–1871) it was moved from the Louvre to the Brest Arsenal. During World War II, the painting was again removed from the Louvre and taken safely, first to Château d'Amboise, then to the Loc-Dieu Abbey and Château de Chambord, then finally to the Ingres Museum in Montauban.