If you're looking for a peaceful place to spend some time, make your way to Schlossturm. This house of prayer offers a wonderful respite from the constant comings and goings of life.
When you've finished up at this Lutherstadt Wittenberg house of prayer, why not check out Wittenberg Luther House, Luther 1517 - Wittenberg 360°, and Melanchthon Haus? They're not far from Schlossturm and also a hit with many travelers.