Catherine Pavlovna of Russia families, the eldest of whom was barely eight years old. After her death, her surviving husband built Württemberg Mausoleum in Rotenberg, Stuttgart, dedicated to her memory. William later married again; his next wife was his first cousin, Princess Pauline of Württemberg. Ekaterina had two sons with Duke George of Oldenburg (9 May 1784 – 27 December 1812): With the King of Württemberg, she had the following children: Catherine Pavlovna of Russia Grand Duchess Catherine Pavlovna of Russia (; 21 May 1788 [OS 10 May 1788] – 9 January 1819) later Queen Catharina Pavlovna of Württemberg, was the fourth daughter of
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