What is form? This question dominates "Point - Line - Plane," one of Kandinsky's main theoretical works, written and published in 1926 during his time as a professor at the Bauhaus.

What the author seeks here is to lay the foundations of a true science of abstract art, in relation to our emotions and our mental structure.

It is perhaps the boldest attempt since the time of codifying the rules of traditional painting, during the Renaissance, by Alberti.