The Patriotic Party, also known as the Patriot Party or, in English, as the Reform Party, was a political movement in the Polish–Lithuanian Commonwealth in the period of the Four-Year Sejm of 1788–1792, whose chief achievement was the Constitution of 3 May 1791. The reformers aimed to strengthen the ailing political machinery of the Commonwealth, to bolster its military, and to reduce foreign political influence, particularly that of the Russian Empire. It has been called the first Polish political party, though it had no formal organizational structure. The Party was inspired by the ideals of the French Revolution, and its name, proudly used by themselves, was a tribute to the Dutch Patriots.
3 May Constitution, by Matejko, 1891. King Stanisław August (left, in regal ermine-trimmed cloak), enters St. John's Cathedral, where Sejm deputies will swear to uphold the new Constitution. In background, Warsaw's Royal Castle, where the Constitution has just been adopted.