Considering the BS Hotel Braunschweig in Braunschweig?
A VT member wrote the following comment about visiting Braunschweig:
Cathedral of St. Blasius by Leipzig
The Cathedral St. Blasius was erected by Henry the Lion between 1173-1195. Henry the Lion chose was buried there in 1195 next to his wife Mathilde.
You can visit the crypta of the cathedral for just one Euro. The admission for the cathedral itself is free.