A pupil of Jean-Charles Langlois, a great admirer of Théodore Géricault, Lansac spent several years at the stud farm in Tarbes, studying horses.
Lansac's former residence, located on 37 Avenue Montaigne, in the 8th arrondissement of Paris, housed until 2017 the visa office of the Canadian Embassy.
The National Museum of the castles of Versailles and Trianon displays the Portrait équestre du maréchal de la Palisse of 1835.
We find in his easel paintings all the qualities that have put Mr. de Lansac among our best artists, the composition is always cleverly studied, the color is warm and strong and the design brilliant.
Mais ce n'est qu'un quatrain pour qui mérite une ode: Il fallait du héros éterniser les traits, Et ne pas s'en servir comme d'un vain prétexte Pour aduler un prince et broder sur le texte Un pareil nombre de portraits.