Paul Klee was a Swiss painter, of German nationality. His father was a music teacher, and his mother, a trained singer. Klee loved dabbling in the visual arts as a teenager and spent a lot of time drawing in his school books. He especially loved caricature. He earned a Fine Arts degree after which he travelled throughout Italy, studying the master painters and spending time with fellow contemporary artists, such as Kandinsky.
The painting below, Ad Parnassum (1932) is considered Klee's masterpiece and the best example of his pointillist style. I love it, it reminds me of a fine mosaic.