Hector Berlioz · Karl Marx Were Hector Berlioz and Karl Marx alive at the same time? Yes. Hector Berlioz and Karl Marx were alive at the same time for 50 years, from 1818 to 1869. Hector Berlioz was 14 when Karl Marx was born.Karl Marx was 50 when Hector Berlioz died, aged 65. Hector BerliozFrench composer and conductorBorn 11 December 1803 · died 8 March 1869, aged 65Karl MarxGerman-born philosopherBorn 5 May 1818 · died 14 March 1883, aged 64 NapoleonHector BerliozAbraham LincolnCharles DarwinKarl MarxLeo TolstoyMahatma GandhiVladimir LeninAlbert Einstein Hector Berlioz and Karl Marx 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.