Shakespeare portrait a fake, say experts

Top art authorities at the UK's National Portrait Gallery have determined that one of the best-known portraits of William Shakespeare was painted two centuries after his death.

"We now think the portrait dates back to around 1818 to 1840, exactly the time when there was a resurgence of interest in Shakespeare's plays," said Tarnya Cooper, 16th Century curator at the National Portrait Gallery, who found chrome yellow paint from the early 19th century embedded in the "Flower Portrait."

The painting was likely based on an engraving which appeared on the first folio publication of Shakespeare's works, published in 1623.