Albert Einstein · Sigrid Undset Were Albert Einstein and Sigrid Undset alive at the same time? Yes. Albert Einstein and Sigrid Undset were alive at the same time for 67 years, from 1882 to 1949. Albert Einstein was 3 when Sigrid Undset was born.Albert Einstein was 70 when Sigrid Undset died, aged 67. Albert EinsteinGerman-born theoretical physicistBorn 14 March 1879 · died 18 April 1955, aged 76Sigrid UndsetNorwegian writerBorn 20 May 1882 · died 10 June 1949, aged 67 Karl MarxAlbert EinsteinSigrid UndsetAdolf HitlerRonald ReaganDonald TrumpVladimir Putin Albert Einstein and Sigrid Undset 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.