Ernest-Paul Sanson (Paris, 12 May 1836 – Paris, 15 January 1918) was a French architect trained in the Beaux-Arts manner. Sanson entered the École des Beaux-Arts de Paris at the age of eighteen, and followed the courses offered by Émile Gilbert. Having received his diploma in 1861, he apprenticed first in the office of Denis-Louis Destors and Charles-Auguste Questel and then with Antoine-Nicolas Bailly, who passed his practice to Sanson when he retired in 1865. Sanson quickly made a grand reputation among aristocrats and the rich haute bourgeoisie for his châteaux and grand Parisian town houses, or hôtels particuliers. He took into his practice his son Maurice Pierre (1864–1913), Victor-Guillaume Bariller and René Sergent. The firm's offices were successively at 43, rue de Saint-Pétersbour