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, Shortly after his election in 1649, he supported George II Rákóczi's efforts to seize the Polish throne by making a deal with Transylvania. At the same time, he established contacts with Sweden for the first time, seeking to separate Lithuania from the Crown. In 1995, Lithuania and Sweden have celebrated the 340th anniversary of the union as a symbol of friendship and historical bonds shared by the two countries.
See also
- Polish–Swedish union