The word 'collage' comes from the French coller to stick.
A picture or composition built up wholly or partly from pieces of paper, cloth, or other material stuck on to a canvas or other ground.
A technique that gained popularity in the west through the cubist works of Picasso and Braque.
The Avant Garde Constructivist made very good use of this technique. Vladimir Tatlin was one of it's greatest practitioners.



This is a work by Vladimir Tatlin that I like; especially for its earth tones and non-objective abstraction. IMHO it represents the best of ‘Constructivism’ which was principally a Russian movement that grew out of ‘Collage’. Tatlin worked with hanging and relief constructions made of a variety of materials, including wire, glass, and sheet metal. Later he turned to architectural and engineering projects such as his projected monument to the Third International; a leaning spiral about 1,300 feet high with counter-rotating central sections.
By 1921 the movement was for all intents dead, mostly for political reasons. Most of its practitioners turned to furniture design, the stage, typography etc. In fact most anything but painting and sculpture. Constructivist ideas and especially Tatlin have had considerable influence on architecture and decoration and continue to do so to this day.

Yes, Pedro, this is the "Pictorial relief" from 1913-1914, and it is located in the Tretyakov Gallery, Moscow.

Another artist who was a master of this technique was Iwan Puni. For example this one that I like - "Pictorial Sculpture" from 1915:



You may see more works by Puni at the Gallery: http://www.russianavantgard.com/artists ... _puni.html

Both Iwan Puni and Vladimir Tatlin were members of the Union of Youth movement.