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
Princess Catherine Ivanovna of Russia from the capital and her mother followed her husband into exile. Catherine and her brother Vsevolod remained in the care of her grandmother, the Grand Duchess Elizaveta Mavriekievna of Russia. On 18 July 1918, their father Prince John was killed, and their mother Princess Jelena was arrested and spent several months in Soviet prisons. Grand Duchess Elizabeth was able to take Catherine and her brother to Sweden. Sometime later, they were reunited with their mother. The family lived in Serbia, then moved to England. There, Catherine received an excellent education, although she never learned the Russian language because her mother,