Cubism was developed in the early 20th century in Paris by Pablo Picasso and Georges Braque. It was the first abstract art style and broke from traditional perspective techniques. Cubist paintings show multiple views of a subject at once to represent how we actually see objects. There were two phases - Analytic Cubism from 1907-1912 which used geometric shapes and limited colors, and Synthetic Cubism after 1912 which incorporated materials like paper cutouts and was more colorful. The inclusion of collage in Cubist works was highly influential for modern art.