The Nazi official Alfred Rosenberg believed that the Nordic race was descended from Proto - Aryans , who he believed had prehistorically dwelt on the North German Plain .
Who had ultimately originated from the lost continent of Atlantis .
The Nazi official Alfred Rosenberg believed that the Nordic race was descended from Proto - Aryans , who he believed had prehistorically dwelt on the North German Plain and who had ultimately originated from the lost continent of Atlantis .