- Born on April 5, 1813 in Saint Petersburg
- Deceased on April 29, 1870 in Paris, at the age of 57 years
Parents
- Nikolaï Demidoff (1773 - 1828), conte de San Donato, industriel, mécène
- Elizaveta Stroganova (1779 - 1818)
Family
- Married on November 1, 1840 in Florence, with Mathilde Bonaparte, La princesse Mathilde (1820 - 1904)
- Relationship with Fanny de La Rochefoucauld (1807 - 1848)
- Relationship with Valentine de Sainte-Aldegonde (1820 - 1891), dame de Beauregard, rentière
- Relationship with Irma Pic de Bonnière
Occupations
- industriel
- mécène
- chambellan de S.M. l'Empereur de Russie
- gentilhomme de sa chambre