Bauhaus

Let's start from Wikipedia:
http://en.wikipedia.org/wiki/Bauhaus

and continue with the following:

Anni Albers Josef Albers Herbert Bayer Max Bill Marianne Brandt Marcel Breuer Avgust Černigoj Christian Dell Werner Drewes Lyonel Feininger Naum Gabo Ludwig Hilberseimer Ludwig Hirschfeld Mack Johannes Itten Wassily Kandinsky Paul Klee Otto Lindig Gerhard Marcks László Moholy-Nagy Piet Mondrian Oskar Schlemmer Lothar Schreyer Joost Schmidt Naum Slutzky Gunta Stölzl And a must read, free online: Dot and Line to Plane by Wassily Kandinsky: https://archive.org/details/pointlinetoplane00kand