Charles Antoine Letrosne (5 April 1868 – 9 August 1939) was a French architect and writer known as the author of the influential three-volume Murs et toits pour le pays de chez nous (1923.

His parents were Paul Ernest Letrosne (1827–1902), an architect and professor at the École nationale supérieure des arts décoratifs, and Augustine Marin (1825–1884).

[1] Charles Letrosne was made Chief Architect of Civil Buildings and National Palaces.

He died on 9 August 1939 at Le Val Martin, Saint-Nom-la-Bretèche, Yvelines, Île-de-France at the age of 71.

[1] Letrosne designed the Temple protestant de Reims in a flamboyant neo-Gothic style influenced by Eugène Viollet-le-Duc.