They also said the memorial site in the southern Polish town of Oświęcim sent a powerful message of warning to future generations.
“When we think WWII, one of the first things that comes to mind is Auschwitz,” said Jarosław Szarek, head of Poland's Institute of National Remembrance.
“A giant death factory—more than 1.1 million victims, mostly Jews from all over Europe … If history is to teach us anything, in places like these, remembrance is a warning.”