Grand Duchess Natalia Petrovna of Russia (1718–1725) children in the Peter and Paul Cathedral in St. Petersburg. Grand Duchess Natalia Petrovna of Russia (1718–1725) Grand Duchess Natalia Petrovna of Russia was the youngest daughter of Peter the Great and his second wife Catherine I. Born in St. Petersburg, on 20 August 1718, during the peace negotiations with Sweden (Aland Congress). When Peter was at this time on the teachings of the galley fleet, and to learn about the birth of his daughter, made a feast, and sent his fleet to St. Petersburg. "This day August 20 at Trinity glorified Almighty God has bestowed His Imperial Majesty the
Duke Peter Alexandrovich of Oldenburg Duke Peter Alexandrovich of Oldenburg Peter Alexandrovich of Oldenburg (Duke Peter Friedrich Georg von Oldenburg) (21 November 1868 – 11 March 1924) was the first husband of Grand Duchess Olga Alexandrovna of Russia, the youngest sister of Tsar Nicholas II. He was born in Saint Petersburg, the only child of Duke Alexander Petrovich of Oldenburg (1844–1932) and Eugénie Maximilianovna of Leuchtenberg (1845–1925). His mother was a granddaughter of Tsar Nicholas I of Russia through Nicholas's daughter, Grand Duchess Maria Nikolayevna, and his father was a great-grandson of Tsar Paul I of Russia through his paternal grandmother Grand Duchess Catherine Pavlovna.