daughters: Princess Marie Friederike Charlotte of Württemberg (1816–1887) who married Alfred, Count von Neipperg (1807–1865); Princess Sophie of Württemberg (1818–1877) who married King William III of the Netherlands (1817–1890). Thirdly on 15 April 1820 in Stuttgart he married another first cousin, Duchess Pauline Therese of Württemberg (1800–1873), a daughter of Duke Louis of Württemberg (1756–1817) and Princess Henrietta of Nassau-Weilburg (1780–1857), by whom he had one son and heir and two further daughters: Princess Catherine of Württemberg (1821–1898) who married Prince Frederick of Württemberg (1808–1870) by whom she was the mother of King William II of Württemberg (born 1848–1921) the last King of Württemberg who succeeded his uncle King Charles I of Württemberg and ruled from 1891 until the abolition of the kingdom in 1918. King Charles I of Württemberg (born 1823–1891), who succeeded his father as king of Württemberg. A homosexual, he married Grand Duchess Olga Nikolaevna of Russia, the daughter of Tsar Nicholas I of Russia, and leaving no issue was succeeded by his nephew King William II of Württemberg (born 1848–1921); Princess Augusta of Württemberg (1826–1898) who married Prince Hermann of Saxe-Weimar-Eisenach (1825–1901). One of her daughters, Pauline of Saxe-Weimar-Eisenach, married Charles Augustus, Hereditary Grand Duke of Saxe-Weimar-Eisenach. Memorials 1st Cannstatter Volksfest 1818-2018 On 28 September 1818, one day after the king's 36th birthday, a big agricultural festival with horse races and prize-giving for outstanding cattle-breeding achievements is celebrated on the so-called Cannstatter Wasen site. Named the "Landwirtschaftliche Fest zu Kannstadt" (Kannstadt Agricultural Festival), it is therefore the 1st Cannstatter Volksfest. 200 years later Cannstatter Volksfest and the 100th Landwirtschaftliches Hauptfest will be celebrated with a historical Volksfest on Stuttgart's Schlossplatz square. Cannstatter Volksfest and the 100th Landwirtschaftliches Hauptfest (an agricultural show)—the founding of the biggest festival in "Ländle", as the state of Baden-Württemberg is affectionately known, by King Wilhelm I and his wife Katharina will be remembered in the heart of Stuttgart on the Schlossplatz square from 26 September to 3 October 2018. At the Historical Volksfest 2018 with King Wilhelm I and his wife Katharina (actors) will be dressed in historical costumes dating back to 1818. Sequoiadendron giganteum In order to cultivate them for their wood, the King had some 5,000 Giant Sequoia (Sequoiadendron giganteum) grown from seed in 1865. He had the seeds sent from California. Today, after years, the remaining examples have reached a height of over . Their older Californian relatives, with