Mona Lisa, oil painting on a poplar wood panel by the Italian painter, draftsman, sculptor, architect, and engineer Leonardo da Vinci, probably the world’s most-famous painting. It was painted sometime between 1503 and 1519, when Leonardo was living in Florence, and it now hangs in the Louvre, in Paris, where it remains an object of pilgrimage in the 21st century. The poplar panel shows evidence of warping and was stabilized in 1951 with the addition of an oak frame and in 1970 with four vertical braces. Dovetails also were added, to prevent the widening of a small crack visible near the centre of the upper edge of the painting. The sitter’s mysterious smile and her unproven identity have made the painting a source of ongoing investigation and fascination.
Source: https://www.britannica.com/topic/Mona-Lisa-painting
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@steemcleaner The first sentence comes straight from Encylopedia Brittanica