It's now much difficult to distinguish works produced by this couple. When she died after cutting her throat, she left an unfinished work titled «The Sad Family», which Prud'hon completed. He also finished many portraits she had painted previously.
Other followers of Prud'hon were Charles Le Boulanger de Boisfremont who completed his last work titled «Andromache», Edouard Rioult, Louis Hersent or Anatole Devosges.
In Italy, Gian-Battista Tiepolo was much copied by his son Domenico while Pietro Longhi was imitated throughout the end of the 19th Century.
Works by Canaletto and by his nephew Bellotto are often difficult to separate while many faked works by Guardi were produced during many decades.
W. Turner copied drawings by Canaletto and was imitated by Auguste Ravier and James Webb while 3,000 works attributed to Richard Parkes Bonington, who died at 26, have been circulating on the art market since 1850. Paul Huet was notably the main follower of Bonington whose father was the main forger of his works.
It must be noted that forgers became quite active during the 19th Century, especially after 1860 when the Bourgeois society started to collect art pieces on a much higher scale. In fact forgeries have always been multiplying as a result of increasing demands on the market.
During the 18th Century, sculptors imitated much their elders. E. M Falconet copied Coustou and Bernini when he produced the equestrian portrait of Peter the Great in Saint Petersburg while C. Allegrain copied works made by his brother-in-law Pigalle. The famous Claude Michel called Clodion received the assistance of his brother Sigisbert and was much copied by a modest artist called Le Broc whose copies were often authenticated as genuine works by this master. Works by Pajou were copied by an artist named Visseaux during the late 19th Century.