The Friends of the Constitution (Polish: Zgromadzenie Przyjaciół Konstytucji Rządowej) was the first modern Polish political party (with a charter and organizational discipline), formed in May 1791, shortly after the adoption of the Constitution of 3 May 1791, by the efforts of the Patriotic Party. The purpose of the Friends of the Constitution was to defend the reformed political system and to introduce further reforms. The party's leading members included Hugo Kołłątaj, Ignacy Potocki, Tadeusz Mostowski, and .