of Antoni and Louise, became the first love of the later Prussian King and German Emperor Wilhelm I. Her brothers Wilhelm (1797–1870) and Bogusław (1809–1873) became Prussian generals and politicians, the latter being an influential opponent of Prussian minister-president (and, from 1871, German Chancellor) Otto von Bismarck in his anti-Catholic politics, later called the Kulturkampf. Bogusław's son Ferdynand (1834–1926) also became an important leader of the Polish minority and opponent of the Germanization and Kulturkampf policies. After Poland regained independence in 1918, he became a Polish citizen and a member of the Polish parliament (Sejm), and so did his son Janusz (1880–1967). Their cousin Stanislaw Radziwiłł was the aide-de-camp to the Commander-in-chief Józef Piłsudski. In German-occupied Poland, Janusz tried to use his prestige to improve Nazi treatment of the Poles – unlike his brother Michał who sided with the Nazis, at least at the beginning of the occupation. After the Second World War in 1945, Janusz was arrested by NKVD, and his wife would die in a communist prison in 1947. Janusz died in his two-room apartment in Warsaw, with all of his possessions confiscated and nationalized by the communist government. In 1959, Janusz's third son prince Stanisław Albrecht Radziwiłł married Caroline Bouvier, the younger sister of First Lady Jacqueline Kennedy. Art patronage Prince Antoni Radziwiłł was a music and art aficionado and he transformed his properties in Berlin to serve as artistic salons, where aristocrats mingled among artists, painters and composers. Radziwiłł’s Berlin properties hosted frequent amateur theatre play productions. Another property Antoni Radziwiłł owned in Prussian-Poland was Antonin, a hunting lodge he had built between 1822-24 by the German architect Karl Friedrich Schinkel, named after him. Later in his life, Antoni Radziwiłł moved permanently to Antonin with his wife, Louise of Prussia, and two daughters Wanda and Eliza. Antoni Radziwiłł was a well-connected composer among European musical circles and with time transformed the Antonin property into a popular musical salon among greatest talents of the area such as Niccolò Paganini, Johann Wolfgang von Goethe, Frédéric Chopin and Ludwig van Beethoven. Chopin gave music lessons to Antoni Radziwiłł’s daughter Wanda during his stays at the property. During his stays with Radziwiłł family, Chopin also had composed the Polonaise op.3 and Piano Trio Op. 8 and dedicated the latter to Radziwiłł. Antoni Radziwiłł also supported some of the artists financially, among them Fryderyk Chopin. Chopin's visits to Antonin property were