Among his commissions are a large number of allegorical architectural figural sculptures, historical portraits ("Victor Hugo", and "Geographie" for the Sorbonne, 1901) and others for the monumental Gare d'Orsay (now the Musée d'Orsay), the Collège des Beaux-Arts, the Grand Palais for the 1900 Exposition, and the Hôtel Dufayel, Avenue des Champs-Élysées (1906, demolished). Public monuments by Marquest are to be found also, in which was very much criticised; as well as monuments for North and South America. He was also the author of portrait busts and statues of Victor Hugo, Léo Delibes, Ferdinand Fabre and a large output of classical subjects. He gained the Grand Prix at the Paris Exposition Universelle of 1900.