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
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,