He is one of the most controversial artists, yet one of the most influential. Picasso's collection contained mainly Renoirs. Matisse revered him. Monet too. Renoir was crucial to the creation of the Impressionist movement, before rejecting it altogether to embark on a radically different genre, with great success. The Barnes Collection in Philadelphia has more paintings by Renoir than any other gallery in the world, and it's here that we'll attempt to lift the veil on the remarkable story of this incredible artist.