"This is a way to commercialize them, showing that they were used by the horror, by the Fuhrer.
"We have turned to historians and they've told us it is the original magnifying glass" that Hitler was using, said Nestor Roncaglia, head of Argentina's federal police.
The investigation that culminated in the discovery of the collection began when authorities found artworks of illicit origin in a gallery in north Buenos Aires.
Agents with the international police force Interpol began following the collector and with a judicial order raided the house on June 8.
A large bookshelf caught their attention and behind it agents found a hidden passageway to a room filled with Nazi imagery.
He moved to Paraguay after Israeli Mossad agents captured Holocaust mastermind Adolf Eichmann, who was also living in Buenos Aires.
Ariel Cohen Sabban, president of the DAIA, a political umbrella for Argentina's Jewish institutes, called the find "unheard of" in Argentina. »