- Born on April 18, 1859 in Saint Petersburg
- Deceased on March 13, 1944 in Paris, at the age of 84 years
Family
- Married on June 22, 1899, with Marie von Mecklenburg-Strelitz (1878 - 1918), divorced, issuing
- Relationship with Eulalia de Borbón (1864 - 1958), femme de lettres
Occupations
- diplomate