Tekla Teresa, entertained Frederick William III of Prussia and his wife to breakfast. The visit was deemed such a success that it led to the king bestowing upon him the Prussian title of count. The estate became a favourite retreat from Warsaw for the Lubieńskis and their family of ten children, which they used for theatrical productions and country pursuits. In 1827 the widowed Lubieński (his wife had died in 1810), now retired from public office, put his energies into the estate. Among other developments, he established 15 new villages. However, his arguably most productive, if doomed, move was to pass the estate onto one of his seven sons, Henryk, an entrepreneur and industrialist, who had greatly contributed to the economic development of Congress Poland. Lubieński senior donated Ruda Guzowska, part of the estate, specifically for the creation in 1833 of a state-of-the-art textile factory, with machinery imported from France along with its inventor, Philippe de Girard. It quickly overtook Guzów in importance as a gmina and eventually became the thriving mill town of Żyrardów. In 1829 Henryk had also established in the vicinity of the manor one of the first sugar factories in the country, with the help of imported machinery from France. However, in 1842 Henryk, by then also a bank director, was accused and convicted of 'misapplying' public funds for his private benefit. He was sent into exile and the estate was confiscated to recover his debts. There is a view that the charges were politically motivated and not based in fact. He returned from detention a broken man and took no further part in public life. Still in the family In 1856 the whole Guzów estate was put up for auction. In the event, it was acquired for the enormous sum of 600,000 silver roubles by Feliks Sobański, the son of a magnate from Podolia. Sobański also happened to be a grandson of Feliks Łubieński through his mother, Róża, and from 1857, married to another Łubieńska, Emilia. He set about rebuilding the manor house, fashioning it into a French Renaissance style palace with a park in the manner of Capability Brown. The gradually reduced Guzów estate remained in the possession of the Sobański family into two World wars, when the palace served as a military hospital. At the start of World War II it was still the property of Antoni Sobański, a wartime writer and journalist