The National Gallery in London will be showing off some embarrassing acquistions and misleading gifts in its major exhibition called Close Examination opening in June.

Works once-removed from the gallery's walls for their dubious nature are being exhumed from the vaults.

One of the museum's mistake is a lovely Florentine allegorical scene, circa 1500, bought as a Botticelli in 1874. The 'not right' work, which was purchased along with 'Venus and Mars,' a real Botticelli, was quietly put away for 140 years.

The exhibition delves into the modern scientific techniques now used by researchers to spot fakes.