 Rosenberger arrived in the United States in 1940 after having spent 5 months in the Dachau concentration camp.From the time he arrived in America until 1944, he lived in a refugee home sponsored by the "Zeirei Agudah" at 616 Bedford Avenue in Williamsburg, Brooklyn.Rosenberger's father had a clothing store in Austria and he was interested in fabrics from a very early age.