'It’s hard to overstate the importance of this collection,' says historian, as new images from Nazi SS officer's personal album clarify findings of archeological excavations

Historians say rare photos of camp -- only 2 were previously known -- appear to show American tried in Germany for allegedly being a guard there

More than 1.1 million Jews were murdered in camp during the Holocaust; contribution in addition to $15 million donated by the US for its upkeep

President to give Hebrew-language speech in memory of the victims of Nazism to the Bundestag; members of the Goldin and Shaul families will be in attendance

Photojournalists Rina Castelnuovo and Jim Hollander turned to colleagues around the globe for The Lonka Project, which has been featured as 2-week exhibit at the United Nations

A chronological look at the notorious Nazi death camp where over 1.3 million people died, from 1940 when the site was first chosen until its liberation by the Red Army in 1945

Jewish victims gather to tell their stories, say prayers for loved ones who died at camp; commemoration comes as Poland bickers with Israel, Russia over Polish complicity in WWII

President tells Duda Nazi Germany had assistance from across Europe, which 'demands acceptance of responsibility' by relevant parties

Over 200 survivors and leaders from some 60 countries to gather for commemoration at former death camp Monday with an exhortation against a new wave of anti-Semitic violence

Critics argue that viewing the photographs risks further dehumanizing their subjects; others say it is important to show real human beings subjected to inhuman suffering