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Marie Leszczyńska (23 June 1703 – 24 June 1768) was a Polish noblewoman and French queen consort. The daughter of King Stanisław I Leszczyński of Poland and Catherine Opalińska, she married King Louis XV of France in 1725 and became queen consort of France, serving in that role for 42 years until her death, the longest of any French queen. Marie was popular due to her generosity and piety. She was the grandmother of future French kings Louis XVI, Louis XVIII and Charles X.

This picture is an oil-on-canvas portrait of Marie by French painter Charles-André van Loo, commissioned by Louis XV in 1747. She is depicted wearing the Sancy diamond, part of the French Crown Jewels. The painting now hangs in the Palace of Versailles.Painting credit: Charles-André van Loo