Polish–Prussian alliance
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The Polish-Lithuanian and Prussian Alliance was a mutual defense alliance signed on 29 March 1790 in Warsaw between representatives of the Polish–Lithuanian Commonwealth and the Kingdom of Prussia. It was signed in the brief period when Prussia was seeking an ally against either Austria or Russia, and the Commonwealth was seeking guarantees that it would be able to carry out significant governmental reforms without foreign intervention.
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.
Great Sejm
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The Great Sejm, also known as the Four-Year Sejm was a Sejm (parliament) of the Polish–Lithuanian Commonwealth that was held in Warsaw between 1788 and 1792. Its principal aim became to restore sovereignty to, and reform, the Commonwealth politically and economically.
Great, or Four-Year, Sejm (1788–92) and Senate adopt Constitution of 3 May 1791 at the Royal Castle in Warsaw.
Stanisław Małachowski, Marshal of the Great Sejm
Royal Castle Senate Chamber, where May 3 Constitution was adopted