Which Nazi concentration camps was Elie Wiesel imprisoned in during World War II?

Elie Wiesel was imprisoned in Auschwitz, including its Buna-Monowitz labor camp component, and later in Buchenwald during World War II. He was deported to Auschwitz with his family, where his mother and a sister perished. Wiesel and his father were then sent to Buna-Monowitz. In January 1945, they were forced on a death march to Buchenwald, where his father died shortly before Wiesel's liberation in April. These experiences profoundly shaped his writings and advocacy for human rights.12