In what place did Matisse reveal his painting " Blue Nude " , shocking the public ?
Whereas Matisse had drawn upon a long tradition of European painting — from Giorgione , Poussin , and Watteau to Ingres , Cézanne , and Gauguin — to create a modern version of a pastoral paradise in " Le bonheur de vivre " , Picasso had turned to an alien tradition of primitive art to create in " Les Demoiselles " a netherworld of strange gods and violent emotions .