 Around 1570, of the at least 700 Protestant congregations in Poland-Lithuania, over 420 were Calvinist and over 140 Lutheran, with the latter including 30-40 ethnically Polish.Protestants encompassed approximately ½ of the magnate class, ¼ of other nobility and townspeople, and 1/20 of the non-Orthodox peasantry.The bulk of the Polish-speaking population had remained Catholic, but the proportion of Catholics became significantly diminished within the upper social ranks.