Ernst Haeckel · Adolf Hitler Were Ernst Haeckel and Adolf Hitler alive at the same time? Yes. Ernst Haeckel and Adolf Hitler were alive at the same time for 30 years, from 1889 to 1919. Ernst Haeckel was 55 when Adolf Hitler was born.Adolf Hitler was 30 when Ernst Haeckel died, aged 85. Ernst HaeckelGerman zoologistBorn 16 February 1834 · died 9 August 1919, aged 85Adolf HitlerDictator of Germany from 1933 to 1945Born 20 April 1889 · died 30 April 1945, aged 56 Abraham LincolnKarl MarxErnst HaeckelMahatma GandhiVladimir LeninAlbert EinsteinAdolf HitlerRonald ReaganNelson Mandela Ernst Haeckel and Adolf Hitler in bold, with some of their best-known contemporaries. Drag across to see the age each reached in any year. Faded ends mark uncertain dates.