The Director of the National Gallery, Dr Nicholas Penny has thanked the Van Gogh Museum for the unprecedented loan of a sunflower painting.
'This exhibition is designed to help those for whom the paintings by Van Gogh are compelling images to understand how they were made - and made again - and out of what materials' he said.
'It will deepen every visitor's appreciation of the artist. We are very grateful to the Van Gogh Museum for making this possible.'
Vincent Van Gogh started painting pictures of sunflowers in 1888 when he left Paris to live in the South of France.
He invited the artist Paul Gauguin to stay with him in a house he rented and painted the sunflowers which had been left in Gaugin's bedroom.
The five paintings he completed now reside in collections around the world in;
Two paintings of sunflowers by the post impressionist artist Vincent Van Gogh have gone on display at the National Gallery.
The paintings have been reunited for the first time in 65 years after the Van Gogh Museum in Amsterdam agreed to lend their painting to the Trafalagar Square gallery.