Georges Braque of monochromatic color and complex patterns of faceted form, now termed Analytic Cubism. A decisive time of its development occurred during the summer of 1911, when Georges Braque and Pablo Picasso painted side by side in Céret in the French Pyrenees, each artist producing paintings that are difficult—sometimes virtually impossible—to distinguish from those of the other. In 1912, they began to experiment with collage and Braque invented the "papier collé" technique. On 14 November 1908, the French art critic Louis Vauxcelles, in his review of Georges Braque's exhibition at Kanhweiler's gallery called Braque a daring man who despises form, "reducing
Czech Cubism secessionist designers such as Otto Wagner and Jan Kotěra. Architects such as Josef Chochol and Pavel Janák devised spiritualist philosophies of design and a dynamic ideal of planar form derived from cubist art. As Cubism spread across the European continent in the early 20th century, its greatest impact can be seen today in the Czech Republic. Pyramid and crystal forms were one of the signature principles seen in Czech Cubism which was incorporated in architecture, furniture, and applied arts. The Museum of Decorative Arts in Prague (UPM) uses the House of the Black Madonna as a permanent exhibition space for