This week, as Picasso celebrates his 80th birthday ... sometimes seems a form of dilettantism, but every art movement from cubism to collage to abstraction, has felt his presence.

Sharp angles. Bare sides. Flat features. Only lines. Am I talking about Picasso’s 1907 Les Demoiselles d’Avignon or about ...

Prior to the painting, Picasso had become famous as one of the founders of Cubism, a style of art in which the subject or object in the painting appears fragmented into geometric forms.

Venerated today as a co-inventor of Cubism, which he developed in spirited competition with Pablo Picasso and Georges Braque, Gris is widely celebrated for pioneering a new kind of art.

Pablo Picasso, born on Oct. 25, 1881, is best known for revolutionizing art as the co-founder of the Cubism movement. Take a look back at his prolific career as one of the most influential artists ...