Even on a simplified map which only shows majority religions, Europe in the 16th century appears confessionally very diverse.
The confessions in Europe, map, 2003, created by: Ernst Klett Verlag; source: Rudolf, Hans Ulrich / Oswalt, Vadim: Taschenatlas Weltgeschichte: Europa und die Welt, 5th ed., Gotha 2008, p.101. With the generous permission of Klett Verlag.