Conversation so far:
What is L'Espirit Nouveau Pavillion?
An important early work of Le Corbusier was the Esprit Nouveau Pavilion.
What is the translation of the name?
CANNOTANSWER.
Was it a painting?
CANNOTANSWER.

Question: How long did it take to do the work?
Self-contained rewrite: How long did L'Esprit Nouveau Pavilion take to do?