Hubert-Jean-Baptiste Rohault de Fleury (26 December 1828 – 11 October 1910) was a French painter and philanthropist.

[1] His brother was Georges Rohault de Fleury (1835–1904), who shared his deep religious beliefs.

At the age of 16 he gained permission from his father to join the merchant marine as an apprentice officer.

In November 1848 he became an apprentice officer in the navy, and was sent to Panama where he came under the wing of the commandant Belvèze, an old family friend.

[6] At the start of the Franco-Prussian War (1870–1871) Hubert Rohault de Fleury and Alexandre Legentil vowed to finance construction of the Sacré-Coeur Basilica if France was spared from assault.

[7] After the situation had calmed down, Legentil and Rohault de Fleury, who were brothers-in-law, soon obtained approval for the project from the Catholic Church.