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 Iranian invaders in the philosophy of “Sarmatism.” This polity’s (*) Henrician articles come from the rule of its first elected king, (10[1])Henry of Valois. Under this polity’s system of Liberum Veto, (10[1])any one (10[1])noble could prevent (10[1])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■