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
Imperial Crown of Russia ceremonial collar), the Crown of Monomakh, sceptre, and orb. Over the centuries, various Tsars had fashioned their own private crowns, modeled for the most part after the Crown of Monomakh, but these were for personal use and not for the coronation. In 1719, Tsar Peter I the Great founded the earliest version of what is now known as the Russian Federation's State Diamond Fund. Peter had visited other European nations, and introduced many innovations to Russia, one of which was the creation of a permanent fund (фонд) to house a collection of jewels which belonged not to the Romanov family,