Kazimierz Smoleń the former prisoner of Auschwitz-Birkenau, and long time director of the Auschwitz-Birkenau Museum passed away on January 27th,2012. Kazimierz Smoleń was arrested in April 1940, deported to Auschwitz on July 6th, 1940 he was given a KL Auschwitz number 1327. He survived the camp for the next almost five years. On January 18th, 1945 with Auschwitz evacuation he was deported to Mauthausen. Finally Kazimierz Smoleń was liberated on May 6th,1945 in Ebensee, a sub camp of Mauthausen, over 5 years after his imprisonment. After the war he was working in the Commission to Investigate the Nazi Crimes in Poland and participated as a witness and expert in trials of SS staff of Nazi Concentration Camps. Kazimierz Smoleń was one of the creators of the State Museum Auschwitz-Birkenau established in 1947 and from 1955 till 1990 he served as the director of the Museum. After retirement he was still devoted to the Auschwitz education and worked witnessing about the camp history to younger generations till his very last days. Blessed be his memory.