Julien-Léopold Boilly, also known as Jules Boilly, was a French artist noted for his album of lithographs Iconographie de l'Institut Royal de France and his booklet Album de 73 portraits-charge aquarellés des membres de l'Institut containing watercolor caricatures of seventy-three famous mathematicians, in particular the French mathematician Adrien-Marie Legendre, the only known portrait of him. Wikipedia