Radziwiłł in the context of "Magnates of Poland and Lithuania"

Count Napoleon Stanisław Adam Feliks Zygmunt Krasiński (Polish: [ˈzɨɡmunt kraˈɕij̃skʲi]; 19 February 1812 – 23 February 1859) was a Polish poet traditionally ranked after Adam Mickiewicz and Juliusz Słowacki as one of Poland's Three Bards – the Romantic poets who influenced national consciousness in the period of Partitions of Poland.

Krasiński was the most famous member of the noble Krasiński family. He was born in Paris to Count Wincenty Krasiński and Princess Maria Urszula Radziwiłł, a member of the aristocratic Radziwiłł family, and became the close companion of his father after his mother's early death from tuberculosis. He was educated by tutors prior to attending the Warsaw Lyceum, where he graduated in 1827. He then started to study law and administration at the Royal University of Warsaw, but was expelled from the university in 1829.

The Radziwiłł Chronicle, also known as the Königsberg Chronicle, is a 15th-century collection of illuminated manuscripts, believed to be a copy of a 13th-century original. Its name derives from the Radziwiłł family of the Grand Duchy of Lithuania (later the Polish–Lithuanian Commonwealth), who kept the manuscript in their Nesvizh Castle during the 17th and 18th centuries. The Radziwiłł manuscript was removed from Königsberg in 1761 and acquired by the Library of the Russian Academy of Sciences in Saint Petersburg, where it is currently preserved under the registration number 34.5.30. The chronicle recounts the history of Kievan Rus' and its neighbours from the 5th century to the early 13th century in pictorial form, illustrating the narrative with more than 600 colour miniatures. Among East Slavic chronicles, the Radziwiłł Chronicle is distinguished by the richness and quantity of its illustrations, which may ultimately derive from the 13th-century prototype.

The Union of Kėdainiai or Agreement of Kėdainiai (Lithuanian: Kėdainių unija, Swedish: Kėdainiai förbund) was an agreement between magnates of the Grand Duchy of Lithuania and the king of the Swedish Empire, Charles X Gustav, that was signed on 20 October 1655, during the Swedish Deluge of the Second Northern War. In contrast to the Treaty of Kėdainiai of 17 August, which put Lithuania under Swedish protection, the Swedish–Lithuanian union's purpose was to end the Lithuanian union with Poland and to set up the Grand Duchy of Lithuania as a protectorate under the Swedish Crown with some of the estates being ruled by the Radziwiłł (Radvila) family.

The agreement was short-lived since the Swedish defeat at the Battles of Warka and Prostki and an uprising organised by the pro-Commonwealth nobility in Poland and Lithuania put an end to Swedish power and to the Radziwiłłs' influence.