Catherine I of Russia to bribe the Ottoman grand vizier Baltacı Mehmet Pasha into allowing a retreat. Mehmet allowed the retreat, whether motivated by the bribe or considerations of trade and diplomacy. In any case Peter credited Catherine and proceeded to marry her again (this time officially) at Saint Isaac's Cathedral in St. Petersburg on 9 February 1712. Catherine was Peter's second wife; he had previously married and divorced Eudoxia Lopukhina, who had borne him the Tsarevich Alexis Petrovich. Upon their wedding, Catherine took the style of her husband and became Tsarina. When Peter elevated the Russian Tsardom to Empire, Catherine became Empress. The
Grand Duchess Anna Petrovna of Russia Grand Duchess Anna Petrovna of Russia Grand Duchess Anna Petrovna of Russia, Tsesarevna of Russia (Anna Petrovna Romanova) ; 27 January 1708, in Moscow – 4 March 1728, in Kiel) was the elder daughter of Emperor Peter I of Russia and Empress Catherine I of Russia. Her sister, Elizabeth of Russia, ruled as Empress between 1741 and 1762. While a potential heir in the reign of her father and her mother, she never acceded to the throne due to political reasons. However, her son Peter would rule as Emperor in 1762, succeeding Elizabeth. She was the "Duchess of Schleswig-Holstein-Gottorp" by