20th Century Art Resources, by Chris Whitcombe.
A site examinng and illustrating major 20th Century styles and periods.
Neo Plasticism *
Neo Plasticism and Purism
Doesburg. Theo van.Theo van Doesburg;
works by van Doesberg in art museums. Artcyclopedia
Mondrian, Piet. Piet Mondrian;
works by Mondrian in art museums, Artcyclopedia
The Picasso Project
A comprehensive, authoritative resource on the life and works of Pablo Picasso.