Veteran Nazi hunter Simon Wiesenthal has died in Vienna at the age of 96.
The human rights NGO named in his honour, the Simon Wiesenthal Center, announced his death on its website this morning.
Mr Wiesenthal helped bring more than 1,100 Nazi war criminals to justice. An architecht by profession, Mr Wiesenthal himself survived the Nazi death camps.
Rabbi Marvin Hier, dean and founder of the Simon Wiesenthal Center, said: "When the Holocaust ended in 1945 and the whole world went home to forget, he alone remained behind to remember.
"He did not forget. He became the permanent representative of the victims, determined to bring the perpetrators of the history's greatest crime to justice.
"There was no press conference and no president or prime minister or world leader announced his appointment. He just took the job. It was a job no one else wanted.