Nazis Had Three Times As Many Detention and Persecution Camps

Holocaust historians are only now piecing together the scattered research in many languages to understand the vast scope of the camps, prisons and punishment centers that scarred German-ruled Europe, like a pox on the landscape stretching from Greece to Norway and eastward into Russia.

Collecting and analyzing fragmented reports, researchers at the U.S. Holocaust Memorial Museum say they have pinpointed some 20,000 places of detention and persecution — three times more than they estimated just six years ago.