Over 100 forged paintings were seized in a raid in Portugal last week. Most of the paintings were done in the style of famous artists, although some were imitations of known works by the artists.

Such forgeries require great artistic skill and knowledge of art. The criminals must also have had great knowledge of the art market, because they made sure to give these paintings forged certificates of authenticity.

A criminal investigator involved told the Wall Street Journal, “Picasso, Miro, Munch, Toulouse-Lautrec… it’s amazing. This is the biggest [hoard of fakes] in Portugal and one of the most important in Europe.”

Read the WSJ article for more detail and for one famous forger’s criticisms of the paintings.