The Black Procession by burghers in this polity helped push urban reforms through a “great” parliament. This polity’s quasi-constitutional Cardinal Laws which empowered nobles but inhibited reform were passed with the help of ambassador Nicholas Repnin. This polity’s nobility held that they were descended from ancient (15[1])Iranian invaders in the philosophy of “Sarmatism.” This polity’s (*) Henrician articles come from the rule of its first elected king, Henry of Valois. Under this polity’s (10[1])system of Liberum Veto, any one noble could prevent the passage of legislation. This country’s May 3 Constitution was adopted by its “Great Sejm” (“saym”) in 1791. For 10 points, name this eastern European polity formed by the union of Lublin, which was subsequently partitioned three times. ■END■