Wassily Kandinsky was a Russian painter who helped pioneer abstract art. He had synesthesia, a neurological condition where he saw colors when listening to music. This experience with synesthesia and being inspired by Impressionist paintings led Kandinsky to create non-representational paintings using color and form to express emotion and music. He developed a style of abstract expressionism that emphasized feelings over recognizable subjects through the use of elements like rhythm, repetition, and unity in his colorful, non-objective compositions.