Jean Metzinger see the cubist works in Room 7 and 8. While Pablo Picasso and Georges Braque are generally acknowledged as the founders of the twentieth-century movement that became known as Cubism, it was Jean Metzinger, together with Albert Gleizes, that created the first major treatise on the new art-form, "Du "Cubisme"", in preparation for the Salon de la Section d'Or held in October 1912. "Du "Cubisme"", published the same year by Eugène Figuière in Paris, represented the first theoretical interpretation, elucidation and justification of Cubism, and was endorsed by both Picasso and Braque. "Du "Cubisme"", which preceded Apollinaire's well known essays,
Braque Triptych Braque Triptych The Braque Triptych (or the Braque Family Triptych) is a c. 1452 oil-on-oak altarpiece by the Early Netherlandish painter Rogier van der Weyden. When open, its three half-length panels reveal, from left to right, John the Baptist, The Virgin Mary with Jesus and Saint John the Evangelist, and on the right, Mary Magdalene. When the wings are closed, the work shows a vanitas motif of a skull and cross. "The Braque Triptych" is the only surviving devotional work by van der Weyden known to be painted for private rather than public display. The altarpiece was probably commissioned by