B
BohemianBrother
Guest
Poland’s borders were actually further East than today. The areas around Lublin and Sandomierz were almost in the middle of Poland in those times.What you’re seeing as ‘Poland’ looks to me more like Lithuania (of that period). And, in the late 1500s, Calvinism took root there.
Poland was a little late to the whole business Counter-Reformation, so for some time it became a safe haven for religious refugees coming from the Holy Roman Empire, and particularly from the lands under Habsburg rule. Especially Bohemia was a hotbed for the Reformed, as Lutheranism was distinctly Germanic.
Interestingly, Unitarianism has its origins in Southern Polish Reformed Protestantism. This also caused a split within the Reformed churches of Poland, which then helped the Counter-reformers easily gain upper hand in Poland and eroded the Protestant side.