Friends of the Constitution

[5] The party's leading members included Hugo Kołłątaj, Ignacy Potocki, Tadeusz Mostowski, Michał Ossowski and Józef Weyssenhof.

[3][7] Since many of the party's members participated in the Sejm's (parliament's) deliberations, the Friends of the Constitution have also been described as the first Polish parliamentary caucus.

[8] Members were also active outside the Sejm and enjoyed support among many segments of society, from szlachta (nobility) salons to more radical, Jacobin-influenced bourgeois circles.

Prominent members included: Deputy Chancellor of the Crown Hugo Kołłątaj, Prince Adam Kazimierz Czartoryski, Prince Józef Poniatowski, Marcin Badeni, Franciszek Barss, Joachim Chreptowicz, Jan August Cichocki, Ignacy Dembiński, Ignacy Działyński, Ksawery Działyński, Antoni Dzieduszycki, Augustyn Gorzeński, Paweł Jerzy Grabowski, Ludwik Szymon Gutakowski, Janusz Stanisław Iliński, Michał Kochanowski, Stanisław Kublicki, Jan Paweł Łuszczewski, Antoni Madaliński, Józef Andrzej Mikorski, Mikołaj Morawski, Tadeusz Mostowski, Adam Naruszewicz, Julian Ursyn Niemcewicz, Józef Kajetan Ossoliński, Tomasz Adam Ostrowski, Scipione Piattoli, Grzegorz Piramowicz, Ignacy Potocki, Stanisław Kostka Potocki,[10] Józef Ignacy Rybiński, Walenty Sobolewski, Stanisław Sołtan, Stanisław Sołtyk, Michał Strasz, Józef Weyssenhoff, Mikołaj Wolski, Ignacy Wyssogota Zakrzewski.

[11] Notable absentees included the King himself (a co-author of the Constitution of 3 May 1791) and Stanisław Małachowski, the Marshal of the Great Sejm, both of whom preferred to maintain a semblance of political neutrality.