LONDON, ENGLAND - JANUARY 24: A gallery assistant stands beside two of Van Gogh's 'Sunflowers' which are on display in a new exhibition at the National Gallery on January 24 2014, in London ...

A hundred years after acquiring one of Vincent van Gogh’s Sunflowers, Britain’s National Gallery in London has brought his vision to life by showcasing three works side-by-side for the first time.