Usually only one area of the castle is heated to indoor temperatures and the other parts are kept at 10-15C to keep the mold at bay. But yeah, it's still going to be nuts.
That’s crazy, I had to look it up. 13,882 McDonald’s in the U.S., meanwhile Germany has roughly 20,000 to 25,000 castles/palaces. You wouldn’t think it would be possible for there to be that many castles in Germany. That’s a lot of communal hard work
But but but muh pine box mcMansion for $700,000 made out of cheap soft pine wood that grows like weeds, rots if any water gets on it, gets eaten like butter by termites, lacks density, very flamable