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
Church reform of Peter the Great a committee of churchmen headed by a lay appointee of the Emperor. Monasteries lost territory and were more closely regulated, resulting in a reduction in the number of monks and nuns in Russia from roughly 25,000 in 1734 to around 14,000 in 1738. The Church — particularly monasteries — lost landed wealth gradually during the seventeenth and eighteenth centuries, but under Empress Catherine II ("Catherine the Great", ruled 1762–1796) monastic lands were effectively nationalised, with some one million peasants on monastery land becoming state serfs practically overnight. A new ecclesiastic educational system was begun under Peter the Great and expanded