Portrait of Dr Gachet was sold in 1990 for 82.5 million dollars. Maybe other paintings would be more valuable but we cannot know as they are not for sale.
This is impossible to know. The most famous example was of course Vincent van Gogh.
Vincent Van Gogh
Vincent van Gogh did, but he was not an impressionist. No famous impressionist has done this.
Germany
It was France
Sunflowers.
In 1888-1890.
it was starry night .
Vincent Van Gogh's work is typically placed in the Post-Impressionist category. He also frequently used the impasto technique.
Vincent Van Gogh or Joesph Raffel.
somewhere
Vincent Van Gogh or Joesph Raffel.