I can safely say that I won’t say very much about Thornage Hall. Really, I wouldn’t visit it unless one was a keen fan of the Bishops of Norvich (Norvic) and their history as this was an ecclesiastical site. The present building dates to the late 15th century and Bishop James Goldwell.
This place started out as a grange and continued so for a few centuries. Some remains of this period are still extant, but not much. I have illustrated the site by the view towards what else is in the area instead of what’s there for the hall of Bishop Goldwell is not spectacular though in the modern day llamas (alpacas?) are kept just outside of it.
The place may have been fortified during the 14th century but there is no real evidence to support this claim. What was built in the late 15th century, however, is a fairly typical hall that, for some reason, I don’t think the bishops ended up visiting very often. It just looks much the same as the rest of Norfolk, and they had better sites to go to (especially in the early days when say Elmham was still an option).