Closson studied at the École des Beaux-Arts, developing a traditional design style that emphasized a neo-Gothic character, sometimes influenced by his work in Egypt.
Closson did, however, take advantage of advances in the use of reinforced concrete and incorporated the technology into his otherwise traditional church designs.
Closson worked with chief architect Alexandre Marcel for developer Édouard Louis Joseph Empain.
Closson also executed Marcel's competition-winning design for a memorial chapel commemorating the Battles of the Marne at Dormans, built between 1921 and 1931.
Closson's design was itself less archeologically correct, nearer in style to the contemporary Église Saint-Pierre-de-Chaillot by Émile Bois.