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
History of Russia over the territories to Russia. However, by twelve years later, all the territories were ceded back to Persia, which was now led by the charismatic military genius Nader Shah, as part of the Treaty of Resht and Treaty of Ganja and the Russo-Persian alliance against the Ottoman Empire, the common neighbouring rivalling enemy. Peter the Great died in 1725, leaving an unsettled succession, but Russia had become a great power by the end of his reign. Innovative tsars such as Peter the Great and Catherine the Great brought in Western experts, scientists, philosophers, and engineers. Powerful Russians resented their privileged