Quote Originally Posted by Rongway View Post
"Carcere" just means "jail/gaol". It's not a proper noun, so does not need to be capitalized in the middle of a sentence.
I disagree on that aspect. If you just say "the carcere" that's fine, but "Carcere IV" is the specific carcere's name and I would expect it to be treated as a proper noun.

It's like the difference between "the high school" and "Exampleton High School".