Wiki: Collage is a technique of an art production, primarily used in the visual arts, where the artwork is made from an assemblage of different forms, thus creating a new whole. A collage may sometimes include newspaper clippings, ribbons, bits of colored or handmade papers, portions of other artwork or texts, photographs and other found objects, glued to a piece of paper or canvas. The origins of collage can be traced back hundreds of years, but this technique made a dramatic reappearance in the early 20th century as an art form of novelty. The term collage derives from the French “coller” meaning “glue”. This term was coined by both Georges Braque and Pablo Picasso in the beginning of the 20th century when collage became a distinctive part of modern art.

Wiki: Whilst Schwitters still created work in an expressionist style into 1919 (and would continue to paint realist pictures up to his death in 1948), the first abstract collages, influenced in particular by recent works by Hans Arp, would appear in late 1918, which Schwitters dubbed Merz after a fragment of found text from the sentence Commerz Und Privatbank in his picture Das Merzbild, Winter 1918–19.^[10][11] By the end of 1919 he’d become famous, after his first one-man exhibition at Der Sturm gallery, June 1919, and the publication that August of the poem An Anna Blume(usually translated as ‘To Anna Flower’, or ‘To Eve Blossom’), a dadaist non-sensical love poem. As Schwitters’s first overtures to Zurich and Berlin Dada made explicit mention of Merz pictures,^[12] there are no grounds for the widespread claim that he invented Merz because he was rejected by Berlin Dada.