Mural painting became a significant part of Fernand Leger's work with commissions for the World's Fairs of 1925 and then 1937, held in Paris. They grew increasingly important during the years preceding his exile in America, then, upon on his return to France, in the context of Reconstruction. Due to his international fame, opportunities arose in Europe, the United States, South America and Canada. Yvonne Brunhammer is the former chief curator of the Musee des Arts Decoratifs in Paris. Pierre Descargues is a famous French art historian and a personal friend of Leger and many other twentieth century artists.