WARSAW (AP) — Kazimierz Smolen, a survivor of Auschwitz who was director of the memorial site there for 35 years, died on Friday, the 67th anniversary of the concentration camp’s liberation. He was 91.

Mr. Smolen’s death, in Oswiecim, the southern Polish town where Nazi Germany operated Auschwitz and Birkenau, was announced by Pawel Sawicki, a spokesman for the Auschwitz-Birkenau state museum....