Karl Marx · Bernhard Riemann Were Karl Marx and Bernhard Riemann alive at the same time? Yes. Karl Marx and Bernhard Riemann were alive at the same time for 39 years, from 1826 to 1866. Karl Marx was 8 when Bernhard Riemann was born.Karl Marx was 48 when Bernhard Riemann died, aged 39. Karl MarxGerman-born philosopherBorn 5 May 1818 · died 14 March 1883, aged 64Bernhard RiemannGerman mathematicianBorn 17 September 1826 · died 20 July 1866, aged 39 Johann Wolfgang von GoetheNapoleonAbraham LincolnCharles DarwinKarl MarxBernhard RiemannLeo TolstoyMahatma GandhiVladimir LeninAlbert Einstein Karl Marx and Bernhard Riemann 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.