Auschwitz concentration camp is a symbol of the Holocaust in southern Poland, one of the most trying moments in human history.

In all, 56 survivors gathered under a huge tent on Monday set up over a gate and railway tracks at the site of the former camp.

Over 1.1 million people were murdered at Auschwitz, including nearly a million Jews. On the day of liberation 80 years ago, only 7,000 were saved.

Survivors of the Nazi's notorious Auschwitz death camp are taking center stage at the memorial service to mark 80 years since its liberation by Soviet troops.

Silence pervades the site of Auschwitz-Birkenau today. Sometimes the only sounds are the soft footsteps of visitors, people who come from all over the world to mourn and to learn, and the voices of their guides speaking in hushed tones into microphones trying to explain the ungraspable.

By Barbara Erling and Kuba Stezycki OSWIECIM, Poland (Reuters) -Auschwitz survivors were being joined by world leaders on Monday to mark the 80th anniversary of the liberation of the Nazi German death camp by Soviet troops,

In just over four-and-a-half years, Nazi Germany systematically murdered at least 1.1 million people at Auschwitz, built in the south of occupied Poland near the town of Oswiecim. Auschwitz was at the centre of the Nazi campaign to eradicate Europe's Jewish population, and almost one million of those who died there were Jews.

Auschwitz survivors warned of the dangers of rising antisemitism on Monday, as they marked the 80th anniversary of the liberation of the Nazi German death camp by Soviet troops in one of the last such gatherings of those who experienced its horrors.

In all, the Nazi regime murdered 6 million Jews from all over Europe, annihilating two-thirds of Europe's Jews and one-third of all Jews worldwide. In 2005, the United Nations designated Jan. 27 as International Holocaust Remembrance Day.