Great place, Wittenberg, Schlosskirche, Stadskirche an Yadegar Asisi are places you need to see. Maybe you don’t know yet, but you have to see.
The appartment run by the family Winter (great, helpful people) is very complete. One thing, when you are above 1.80 mtrs you might have some trouble in kitchen and basic douche facility. Bring a bike and discover this beautiful city and region. Oh, breakfast in the Backerei arond the corner in the Netto supermarket.