Ingres ' portrait of Bertin was a critical and popular success , but the sitter was a private person . Although his family worried about caricature and disapproved , it became widely known and sealed the artist 's reputation . It was praised at the Paris Salon of 1833 , and have been influential to both academic painters such as Léon Bonnat and later modernists including Pablo Picasso and Félix Vallotton . Today art critics regard it as Ingres ' finest male portrait . It have been on permanent display at the Musée du Louvre since 1897 .