The images are haunting: naked and emaciated children at Auschwitz standing shoulder to shoulder, adult prisoners in striped clothing posing for police-style mugshots.

One of several photographers to capture such images, Wilhelm Brasse, has died at the age of 95.

A Polish photographer who was arrested and sent to Ausch-witz early in World War II, he was put to work documenting his fellow prisoners, an emotionally devastating task which tormented him long after his liberation.

Jaroslaw Mensfelt, a spokesman at the Auschwitz-Birkenau museum, said Brasse died in Zywiec, a town in southern Poland.

Brasse, who was born in 1917 and was not Jewish, was sent to Auschwitz at 22 as a political prisoner for trying to sneak out of German-occupied Poland in the spring of 1940.

Because he had worked before the war in a photography studio in Katowice, southern Poland, he was put to work in the camp’s photography and identification department.

The job helped to save his life, enabling him to get better treatment and food than many others. Because he worked with the SS, the elite Nazi force, he was also kept cleaner “so as not to offend the SS men”, he recalled in an interview in 2006.

After the war, he had nightmares for years of the Nazi victims he was forced to photograph. Among them were emaciated Jewish girls who were about to undergo cruel medical experiments under the infamous Dr Josef Mengele.

“I didn’t return to my profession because those Jewish kids, and the naked Jewish girls, constantly flashed before my eyes,” he said. “Even more so because I knew that later, after taking their pictures, they would just go to the gas.”

In the interview, Brasse said he believed he took about 40,000 to 50,000 of the identity photographs that the Nazis used to register their prisoners – part of the Nazi obsession with documenting their work. These pictures are among some of the notorious