[1] Rosner was a successful cabaret artist and entertainer in Kraków, Poland by the time the country was invaded and occupied by Nazi Germany in 1939.
[2][3] While at Płaszów, Rosner, along with his brother Henry, were forced to perform for the notorious camp commandant Amon Göth.
Schindler had Rosner and his surviving family members moved to his camp in Brněnec, Czech Protectorate, in 1945.
Rosner suffered from Alzheimer's disease in his later years, but was still able to perform at his and Helen's 65th wedding anniversary celebration in 2008.
[1] Leo Rosner died on 10 October 2008, at the age of 90, of complications from Alzheimer's disease in Melbourne, Australia.
[1] His wife, Helen Rosner, died in 2010 after suffering from heart problems and Parkinson's disease, at age 86.