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
Tsarevna Praskovya Ivanovna of Russia Tsarevna Praskovya Ivanovna of Russia Praskovya Ivanovna (1694–1731) was a Russian tsarevna, daughter of Tsar Ivan V of Russia and Praskovia Saltykova. She was the niece of Tsar Peter the Great and the sister of Empress Anna Ivanovna. Praskovya's father died in 1696 and she was raised with her sisters, Catherine and Anna, at the estate awarded to her mother by Tsar Peter, Izmaylovo Estate in Moscow. She was tutored in literature and the sciences by German teachers. Praskovya was described by the Spanish ambassador in comparison to her sisters as lacking in intelligence, in addition to being very sickly.