Articles of the Warsaw Confederation are signed, sanctioning freedom of religion in Poland.

The Warsaw Confederation, also called the Compact of Warsaw, was a political-legal act signed in Warsaw on 28 January 1573 by the first Convocation Sejm held in the Polish Commonwealth. Convened and deliberating as a confederation between 6 and 29 January 1573, during the Commonwealth's first interregnum period (1572–1574), it aimed to form a general confederation to prepare the election of a new king of Poland and ensure continuity during the interregnum. The confederation also pursued the goal of a religious tolerance edict, while ensuring the political equality of dissenters with Catholics. It was one of the first European acts to grant freedom of religion.

Freedom of religion or religious liberty, also known as freedom of religion or belief (FoRB), is a principle that supports the freedom of an individual or community, in public or private, to manifest religion or belief in teaching, practice, worship, and observance. It also includes the right not to profess any religion or belief or "not to practice a religion".