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
Duke Peter Georgievich of Oldenburg 1809 to Grand Duchess Catherine Pavlovna of Russia. Duke George, who had been appointed governor on the Volga, died six month after Peter Georgievitch, his second, was born. Peter's mother Grand Duchess Catherine Pavlovna of Russia was the favorite sister of Tsar Alexander I of Russia who took his two nephews, Peter and his older brother Alexander, under his protection. The brothers lived in Russia until his mother married King William I of Württemberg in 1816. They moved to Württemberg and were educated in Stuttgart. At the death of his mother, less than three years later, Peter and his brother