 In 1765 he scored a significant triumph when his portrait of Louis, Duke of La Rochefoucauld and his family, painted in competition with Jean-Baptiste Greuze, was awarded the prize.He also painted several portraits of members of the French royal family and foreign princes, including the Swedish king Gustav III and his brothers.In the second half of the 18th century, having one's portrait painted by Roslin was the highpoint of public esteem.