Conversation so far:
When did Le Corbusier start painting?
1918
What did Le Corbusier do between 1918-1922?
Le Corbusier did nothing but concentrate on Purist theory and painting.
What is the name of Le Corbusiers cousin?
Pierre Jeanneret
What kind of architectures did Pierre Jeanneret and Le Corbusier design?
Several different single-family house models using modern industrial methods and materials.
what was cubism?
Cubism is an art movment that happened in the early 20th century.
What was the manifesto that Le Corbusier and Amédée Ozenfant published?
Après le cubisme

Question: what did it talk about?
Self-contained rewrite: What did the manifesto Après le cubisme talk about?