He acquired a significant collection of impressionist works, including paintings subsequently exhibited in museums in Europe and the United States.

[2] Count Doria grew up in the family castle in Cayeux-en-Santerre and a hôtel particulier on the rue de la Perle in Le Marais, Paris.

[1] During the Franco-Prussian War of 1870, he encouraged local inhabitants to enlist in the French army and protected the town from the Prussian invaders.

[4] Count Doria was the owner of The Roman Campagna, with the Claudian Aqueduct, an 1826 painting by Corot which is now in the permanent collection of the National Gallery in London.

[1] Another Millet painting he owned, View of Farm Buildings across a Field, is now in the collection of the Ashmolean Museum in Oxford.

[9] Count Doria also mentored Léon-Honoré Labande, who served as the archivist of the Prince's Palace of Monaco from 1906 to 1939.