umeshpatil wrote:
"The Copper Butterfly, an unsigned classical painting, was carbon dated to ascertain its age, previously estimated at 520 years. Manuscripts from that time reveal that one of two possible artists must be responsible for the painting's creation. One of the artists died one week after the painting had been commissioned while the other died 13 years later. Because in those days oil paintings usually took a long time to complete, it was probably the artist who died later who painted the Copper
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