. In this work, Lhote argues that a landscape should not merely be a "viewpoint" or a "momentary pleasure" but a "reasoned" construction based on geometric simplification and structured color. Key Concepts in the Treatise

His seminal work, Traité du paysage (written in French, 1939), represents his attempt to codify the rules of landscape painting with the same geometric rigor he applied to figure painting. He sought to rescue landscape from mere "impressionistic sentimentality," arguing for a structured approach where mountains, trees, and rivers are organized into dynamic, architectonic rhythms.