The last time the public saw these paintings, Hitler was chancellor of Germany.
These works of art are so important, and so controversial, that their location remains a secret.
But now, for the first time, we have been granted access to a few of them, courtesy of the BBC.
I’m talking of the 1,500 or so works of art, many stolen by the Nazis, that Cornelius Gurlitt kept in his house for more than half a century.
They include multi-million dollar pieces by the likes of Picasso, Renoir, Monet and Manet.
Take a look for yourself, and see if you find this video as astonishing as I do.