the Marbach stud. Around the country, Catherine set up charities, which were controlled by a national charity in Stuttgart. Donations were received from the private property of the royal couple, by Catherine's mother the Tsarina, and by other members of the royal family. The Württembergische Landessparkasse (Wurttemberg State Savings Bank) was established on 12 May 1818 on Catherine's initiative. At the same time, a poor relief authority was set up in the Ministry of Interior. The completion of the Katharinenhospital in 1828 was initiated via a donation by Catherine in 1817. The Mohrenköpfle is a breed of pig. On the orders of King Wilhelm I, these "masked" pigs were imported from Central China in 1820/21, in order to improve pig breeding in the kingdom of Württemberg. Cross-breeding local breeds with these "Chinese pigs" was particularly successful within stocks of domestic pigs in the Hohenlohe region and the area around the town of Schwäbisch Hall. Death of Queen Catherine Catherine and William's second daughter Sophie, who later became Queen of the Netherlands, was born on 17 June 1818. Despite the outwardly harmonious marriage of William and Catherine, William had extramarital affairs. He took to his former lover Blanche La Flèche again. Eduard von Kallee, born on 26 February 1818 is thought to be his illegitimate son. When Catherine found her husband in Scharnhausen on 3 January 1819, with a lover (presumably Blanche La Fleche), she travelled back to Stuttgart. She died of complications from pneumonia on 9 January. William had the Württemberg Mausoleum constructed for her on Württemberg Hill and she was buried in 1824. To cover up the circumstances of her death he tried to obtain her letters, which he suspected contained information about his love affairs. The main political reason for this was so Württemberg's relationship with Russia would not be strained. William wrote in a letter that he was considering abdication. He wanted his brother Paul to renounce his claim to the throne, in favour of Paul's son, Frederick. After their mother's death, Catherine's sons by her first marriage went to live with their grandfather, Peter, the-then regent and later Grand Duke of Oldenburg. Period of consolidation Family and private life Soon after the death of Queen Catherine, William sought a new marriage. He looked again to a cousin, Pauline (1800–1873) who was the daughter of his uncle Louis and 19 years his junior. The wedding took place