The first church important in Wittenburg is the place where Martin Luther was married, where his children were baptised and where he regularily preached. The outside is simple. Below is what remains of his pulpit.
The second church important to Luther's town is the Castle Church. This was a place for theological discussion and debate. It was where he posted his 95 theses that began the Protestant Reformation process.
Here is Luther's grave, at the Castle Church.
http://www.sacred-destinations.com/germany/wittenberg.htm 
