Catherine I of Russia wife. It is clear that Menshikov and Marta formed a lifetime alliance. It is possible that Menshikov, who was quite jealous of Peter's attentions and knew his tastes, wanted to procure a mistress on whom he could rely. In any case, in 1703, while visiting Menshikov at his home, Peter met Marta. In 1704, she was well established in the Tsar's household as his mistress, and gave birth to a son, Peter. In 1705, she converted to Orthodoxy and took the new name of Catherine Alexeyevna ("Yekaterina Alexeyevna"). She and Darya Menshikova accompanied Peter and Menshikov on their military excursions.
Tsardom of Russia also continued and war with Persia brought about the acquisition of territory in the Caucasus, although Russia surrendered those gains after Peter's death in 1725. There was no single flag during the Tsardom. Instead, there were multiple flags: Tsardom of Russia The Tsardom of Russia (, "Russkoje tsarstvo" later changed to , "Rossiyskoye tsarstvo"), Polish-Lithuanian Commonwealth called it Tsardom of Muscovy, was the centralized Russian state from the assumption of the title of Tsar by Ivan IV in 1547 until the foundation of the Russian Empire by Peter the Great in 1721. From 1551 to 1700, Russia grew 35,000 km