The objects, discovered earlier this month in a hidden room of a house in the northern part of the city, included equipment used for Nazi medical experiments during the Holocaust. They were analyzed a week ago at Interpol headquarters in Lyon, France, Federal Police Commissioner Marcelo El Haibe told JTA on Monday.

The police found a bust relief of Adolf Hitler, medical devices marked with swastikas used to measure head and body size, Nazi puzzles for children and knives, among other objects.

Among the objects discovered was a magnifying glass attached to a photo of Hitler using the magnifying glass.

“We checked some marks and characteristics, and it is the same object that Hitler holds in his hands in the photo,” El Haibe, a member of Interpol who accompanied the pieces to Lyon, told JTA. “Interpol colleagues from Germany, Israel and United States were surprised by the globally unprecedented discovery. No one has a record of this magnitude a discovery of original Nazis objects, and we have started a collaborative process to search the route of the objects to Argentina.”

According to El Haibe, who also serves as the chief of the Protection of Cultural Heritage department of the federal police, only a very high level of Nazi officer had access to this quality and quantity of objects, and apparently tried to save the objects when the Nazi regime was failing.

On Monday night, the Argentine Jewish political umbrella DAIA displayed some of the objects at its headquarters in the AMIA Jewish center here. The AMIA building was destroyed in a 1994 terrorist bombing and rebuilt in 1999.

DAIA President Ariel Cohen Sabban praised the police for their work in making the discovery.

“From this building we spoke several times about the lack of security in this country, but today it’s time to recognize the good work done by the police and the Security Ministry,” he said. “These objects are an irrefutable testimony to the Nazi horror and that Argentina was a refuge” for the Nazis.

Among the attendees were Germany Embassy officials, judges, intellectuals and businessmen, as well as the Jewish philanthropists Eduardo Elsztain and Marcelo Mindlin, who was named recently the president of the Holocaust Museum of Buenos Aires.

“This collection is a great responsibility; we will prepare our site to receive this contribution,” Mindlin told JTA. “There will be a lot of fanatics that will want to enter, there will be people trying to steal objects,” he added, noting that “huge security issues” must be worked out.

In June 2016, a collector from Argentina paid $680,000 for a pair of Nazi-owned underpants and other memorabilia.

“It’s impossible that one collector would have this invaluable amount of original Nazi objects,” DAIA vice president Alberto Indij told JTA. “These [objects] likely belonged directly to Hitler or Joseph Mengele. Someone escaped with all this objects. There isn’t a person that bought all this. No, these were Nazi officers trying to hide and save these objects.”

The magnifying glass and accompanying photo of Hitler were not put on  public display, but Indij saw them at Interpol headquarters and confirmed their existence to JTA.

Mengele, a doctor who performed experiments on Jewish prisoners, lived in Argentina for a decade after the war in the same area of Buenos Aires where the Nazi medical tools were discovered. El Haibe said there could be some link between Mengele and the recently discovered tools.

“There are strong coincidences of tools, practices, locations; we are investigating this hypothesis right now,” he said. “But for sure this did not belong to a low-level Nazi follower. This belongs to a very high-level Nazi official who brought them to Argentina.”

Argentina was a refuge for Nazis like Mengele after World War II. Adolf Eichmann was captured in the northern area of Buenos Aires in 1960, and another war criminal, Erich Priebke, also lived there.

A video about the Interpol evaluation, dubbed Operation Near East since many objects of Asian historical significance also were discovered during the raids earlier this month, was released Monday by the Argentine Federal Police.

The objects were found June 9 following a nine-month police investigation. They are in the custody of the justice who is tasked with investigating the find, who has put a gag order on most aspects of the case.

One suspect identified by the police is not in Argentina. There are Argentine and non-Argentine suspects being investigated, but no further details have been provided. Argentina has had an anti-discrimination law on the books since 1988 that covers the possession and sale of such objects.