I used Lutherstadt Wittenberg as a base for visiting the many WHS in the area. Trains took me as far as Bad Muskau in the east and Eisleben in the west for day trips, as well as to Quedlinburg, Worlitz and Dessau.
Being rather ignorant of Luther and his activities I did learn a lot by visiting Wittenberg and Eisleben. But I wondered what the bus loads of Chinese and Japanese tourists visiting these sites made of it.
Architecturally the churches are rather austere, although I did like the decorated ceiling and pulpit of St Anne's church in Eisleben.