Irena Sendler (also called as Irena Sendlerowa in Polish) (15 February 1910 - 12 May 2008) was a social worker who during World War II was an activist in the Polish Underground and Polish anti-Holocaust resistance in Warsaw. She helped save about 2500 Jewish children from the Warsaw Ghetto by providing them with false documents and finding hiding places in individual and group children houses out of the Ghetto in Warsaw.More