National Gallery of Canada
Cybermuse: Introduction to Pictorial Space
A site featuring the work of Cezanne, Monet, Picasso, and Mondrian, among others, that explores pictorial space in a composition There are lesson plans for ages 4-18, and a great section where works are juxtaposed for comparison. Use the...
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Hop's Gallery: Perspective Study
This webpage explores traditional perspective drawings as well as contemporary drawings, focusing on their use of horizontal and vertical lines.