The Melanchthonhaus is the best-preserved Renaissance residential building in Germany and was home to Philip Melanchthon, Luther's closest colleague and the systematic theologian of the Reformation. Unlike the Lutherhaus (which was a monastery), this is a domestic townhouse, and it gives a vivid sense of how a prosperous humanist scholar of the sixteenth century lived and worked.
The house has been a museum since 1898. The collection focuses on Melanchthon's life and the humanist dimension of the Reformation — his school reforms, his correspondence with scholars across Europe, and his role in shaping Protestant doctrine. The building itself is architecturally lovely, with Renaissance proportions and original period furnishings.