Didier Rittener Author:Ralf Beil, Catherine Macchi de Vilhena, Didier Rittener Including intricate drawings on paper of giant creatures, spacious arrangements of conflicting abstract shapes (circles, lines, and cubes), and graphite wall drawings of mysterious crests, the varied work of Swiss artist Didier Rittener has a virtuosity reminiscent of Drer and the spare black-and-white power of ancient, obscure cave paintings.