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
Duke Peter Georgievich of Oldenburg 1809 to Grand Duchess Catherine Pavlovna of Russia. Duke George, who had been appointed governor on the Volga, died six month after Peter Georgievitch, his second, was born. Peter's mother Grand Duchess Catherine Pavlovna of Russia was the favorite sister of Tsar Alexander I of Russia who took his two nephews, Peter and his older brother Alexander, under his protection. The brothers lived in Russia until his mother married King William I of Württemberg in 1816. They moved to Württemberg and were educated in Stuttgart. At the death of his mother, less than three years later, Peter and his brother