Paul I of Russia which event the Russian Imperial Crown was crafted by court jewellers. The 8-year-old Paul retained his position as crown prince. In 1772, her son and heir, Paul, turned eighteen. Paul and his adviser, Panin, believed he was the rightful tsar of Russia, as the only son of Peter III. His adviser had also taught him that the rule of women endangered good leadership, which was why he was so interested in gaining the throne. Distracting him, Catherine took trouble to find Paul a wife among the minor princesses of the Holy Roman Empire. She chose Princess Wilhelmina of Hesse-Darmstad, who
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.