ENTe article discusses the Warsaw Confederation of 1573 in the context of the history of religious conficts in 16th-century Europe. The author argues that the idea of religious tolerance was unimaginable in most European countries during the Reformation. However, the Polish-Lithuanian Commonwealth (like Transylvania) defed this norm, finding a peaceful, even pioneering solution to the problems of post-Reformation religious dissent. This was largely due to its earlier political and cultural experience of dealing with religious divisions. Keywords: Warsaw Confederation, Polish-Lithuanian Commonwealth, Reformation, religious wars in Europe.