Pablo Ruiz Picasso (1881-1973), the most prolific and influential artist of the 20th century, shifted the emphasis of art from its traditional concern with beauty toward radical innovation. The son of an art teacher, Picasso demonstrated remarkable talents as a child and entered the royal art academy in Madrid at age sixteen. Less than a year later, he abandoned his studies and soon joined several avant-garde artist and anarchist groups in Barcelona and Paris. After passing through a succession of stylistic periods, most notably the Blue (1901-1904) and Rose (1904-1906) Periods, he collaborated with Georges Braque (1882-1963) in 1908 to invent Cubism, a revolutionary method of restructuring pictorial space. Picasso remained active until his death in 1973. Although his art still appears radical, many of his works are over one hundred years old. Cubism, perhaps the most important development in 20th-century art, was invented around 1908 by Pablo Picasso (1881-1973) and Georges Braque (1882-1963). The most revolutionary aspect of the style was not its obvious emphasis on geometric form; rather, it was the introduction of a radically new approach to configuring pictorial space. Since the Renaissance, artists had used various methods to create the illusion of distant space receding behind the canvas surface. The Cubists rejected that idea and collapsed space by compressing foreground, middle ground, and background into a continuous web of overlapping, intersecting planes. During the 1910s, other painters and sculptors embraced or adapted Cubism to their own ends. This revolutionary approach inspired a host of related movements and continues to influence the visual language of artists, architects, and designers throughout the world.