Primary sourceDocument3 May 1791
Constitution of May 3, 1791
3 May 1791
The reform constitution of the Polish–Lithuanian Commonwealth, which Kościuszko defended as a general before it was overturned, triggering his 1794 uprising.
Kościuszko fought as a general to defend this constitution in 1792, and its overthrow led directly to his 1794 Uprising.

About this source
What it is
The Constitution of 3 May 1791 was a written constitution for the Polish–Lithuanian Commonwealth, adopted by the Great Sejm and drafted mainly by figures including Ignacy Potocki and Hugo Kołłątaj. It introduced checks and balances, equality between townspeople and nobility, and protection for peasants.
Why it matters
Neighbouring powers reacted with hostility, and Russia and Prussia helped defeat the Commonwealth in the 1792 war, in which Tadeusz Kościuszko served as a major general defending the new order. The constitution was declared void within two years, and the partitions that followed ended Poland's and Lithuania's independence for well over a century, directly provoking Kościuszko's 1794 Uprising.
Look closer
- What rights did the constitution extend beyond the nobility, and why was that controversial?
- Why did foreign powers see this reform as a threat to their own interests?
- How does the connection between this document and Kościuszko's later uprising show the link between law and armed resistance?
This document is part of the curated material that grounds the AI version of Tadeusz Kościuszko on Humy.ai — when students ask about related events, the AI can quote it and cite it.
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