Were Alexander I of Russia and Charles Darwin alive at the same time?
Yes. Alexander I of Russia and Charles Darwin were alive at the same time for 16 years, from 1809 to 1825.
Alexander I of Russia was 31 when Charles Darwin was born.
Charles Darwin was 16 when Alexander I of Russia died, aged 47.
Alexander I of Russia
The tenth Emperor of Russia
Born 12 December 1777 (Julian calendar) · died 19 November 1825 (Julian calendar), aged 47