(Reuters) - Unfinished sketches by the famed French artist Paul Cezanne have been found hidden on the backs of two of his watercolors, a Pennsylvania-based art foundation said on Saturday.
The Barnes Foundation said the sketches, one graphite and one watercolor, likely have not been seen since the early 20th century.
They were discovered when art conservators in Philadelphia undertook a conservation treatment of paintings known as "The Chaine de l'Etoile Mountains," and "Trees," both of which depict French landscapes.
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