A primary influence that led to Cubism was the representation of three-dimensional form in the late works of Paul Cézanne, which were displayed in a retrospective at the 1907 Salon d'Automne.[3] In Cubist artwork, objects are analyzed, broken up and reassembled in an abstracted form—instead of depicting objects from one viewpoint, the artist depicts the subject from a multitude of viewpoints to represent the subject in a greater context.[4]
http://en.wikipedia.org/wiki/Cubism
Useful resource below
http://pndphotography.wikispaces.com/Cubist+Photo+Collage