 Sobolewski traveled the world lecturing audiences on his experiences in Auschwitz and warning against Holocaust denial, including a speaking engagement as recently as 2009 to high school students in Alabama.At ceremonies held in Jerusalem in 1995, he was among 3000 Auschwitz survivors who commemorated the 50th anniversary of the camp's liberation.Sobolewski died of pneumonia complicated by Alzheimer's disease at his home in Bayamo, Cuba, on August 7, 2017, at the age of 94.