'La Porte (Objet)' from 1931 represents Joan Miró at his most radical and most iconoclastic. Simon Shaw, Co-Head, Impressionist & Modern Art Worldwide, explains that this work, which comprises both found and created objects, resists all categorisation. The remarkable piece will be offered on 4 November as part of The Collection of A. Alfred Taubman Masterworks auction. Visit sothebys.com/taubman.