Karl Marx · Wilhelm Röntgen Were Karl Marx and Wilhelm Röntgen alive at the same time? Yes. Karl Marx and Wilhelm Röntgen were alive at the same time for 37 years, from 1845 to 1883. Karl Marx was 26 when Wilhelm Röntgen was born.Wilhelm Röntgen was 37 when Karl Marx died, aged 64. Karl MarxGerman-born philosopherBorn 5 May 1818 · died 14 March 1883, aged 64Wilhelm RöntgenGerman physicistBorn 27 March 1845 · died 10 February 1923, aged 77 NapoleonAbraham LincolnKarl MarxWilhelm RöntgenMahatma GandhiVladimir LeninAlbert EinsteinAdolf HitlerRonald Reagan Karl Marx and Wilhelm Röntgen 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.