Imitation is the highest form of flattery?

Evening Prayer by Jean-Francois Millet, 1857 

compared to:  

Evening Prayer by Vincent Van Gogh, 1881

Vincent Van Gogh (1853-1890) did not start painting
until his late twenties and completed his most famous
works during the last two years of his life.

Noon by Jean-Francois Millet, 1866

Noon Rest From Work by Vincent Van Gogh, 1890

One of the most prolific Post Impressionists, Van Gogh produced

more than 2,100 artworks including 860 oil paintings and more

than 1,300 watercolors, drawings and sketches in less than 10 years.

Peasant Woman With Her Child by Aime Jules Dalou, 1873

Peasant Woman With Child by Vincent Van Gogh, 1880

Maybe he ran out of ideas and turned to other artists for
inspiration.  I'm sure the descendants of Millet and Dalou wish
the originals were as valuable as Van Gogh's imitations.