I find Wikipedia a great data base giving information which no other encyclopedia would give.
I do my bit when somebody tries to mutilate (not edit) an article by, for instance, deleting whole paragraphs or links just because he/she does not like it.
Portrait of Ambroise Vollard is an 1899 oil-on-canvas portrait by Paul Cézanne of his art dealer Ambroise Vollard. It was bequeathed by Vollard on his death to the Petit Palais in Paris, where it is still housed today. Like many of his portraits, the Portrait of Ambroise Vollard displays the significant role of the subject in Cézanne's life, and specifically, the artist's gratitude for promoting his work and establishing his reputation as an artist.Painting credit: Paul Cézanne