 The Bertin portrait has been hugely influential . At first it served as a model for depictions of energetic and intellectual 19th @-@ century men , and later as a more universal type . Several 1890s works closely echo its form and motifs . Jean @-@ Joseph Benjamin @-@ Constant 's monochrome and severe 1896 Portrait of Alfred Chauchard is heavily indebted , while Léon Bonnat 's stern 1892 portrait of the aging Ernest Renan has been described as a " direct citation " of Ingres ' portrait . 
 The Bertin portrait <a href='uninflect' title='1'><mark>has</mark></a> been hugely influential . At first it served as a model for depictions of energetic and intellectual 19th @-@ century men , and later as a more universal type . Several 1890s works closely echo its form and motifs . Jean @-@ Joseph Benjamin @-@ Constant <a href='null_genetive' title='2'><mark>'s</mark></a>monochrome and severe 1896 Portrait of Alfred Chauchard <a href='drop_aux' title='3'><mark>is</mark></a>heavily indebted , while Léon Bonnat <a href='null_genetive' title='4'><mark>'s</mark></a>stern 1892 portrait of the aging Ernest Renan <a href='been_done' title='5'><mark>has</mark></a> been described as a " direct citation " of Ingres <a href='null_genetive' title='6'><mark>'</mark></a>portrait . 
The Bertin portrait have been hugely influential . At first it served as a model fa depictions of energetic and intellectual 19th @-@ century men , and later as a more universal type . Several 1890s works closely echo its form and motifs . Jean @-@ Joseph Benjamin @-@ Constant  monochrome and severe 1896 Portrait of Alfred Chauchard heavily indebted , while Léon Bonnat  stern 1892 portrait of da aging Ernest Renan done been described as a " direct citation " of Ingres  portrait .