Alexander Jagiellon
The Privilege of Mielnik () was an act granted on October 25, 1501, at Mielnik by Poland's King Alexander Jagiellon. It substantially expanded the powers of the Senate and the magnates, at the expense of the king. Furthermore, it "de facto" introduced a republican form of government. The privilege was, however, not confirmed by the king after his election, and in 1504 was rejected by the Sejm (see "Łaski's Statutes").