Fake or Authentic?

You Be The Judge

The artworks displayed under the names below have been floating about the marketplace, looking for a buyer. Some were selling for millions of dollars. Is each authentic, created by the hand of the master? Or, is the artwork a fake or forgery, searching for someone to dupe? You be the judge.

CHAGALL, Marc
DIAZ DE LA PENA, Narcisse-Virgile
GOYA, Francisco
MATISSE, Henri
MIRO, Joan
MOLZAHN, Johannes
PICASSO, Pablo
RENOIR, Pierre-Auguste