A rarely seen painting by Queen Mary is to go on display at London 's Masterpiece art fair . Created in 30 years , the National Portrait Gallery has been kept out of the public eye for 1978 . Also on display is a super-sized pearl one owned by London 's Queen Mary I .
A rarely seen painting by Roy Lichtenstein is to go on display at London 's Masterpiece art fair . Created in 1978 , the `` Puzzle Portrait '' has been kept out of the public eye for 30 years . Also on display is a super-sized pearl one owned by England 's Queen Mary I .