I noticed this quote by knppel
That is something I would like to know how to do. I am always so annoyed when I have a church or a town in my own personal demesne duchy, so that means I either take a 'wrong type of holding' penalty if I want to own the county, or I lose the county, and the person who owns the county gains a -50 "desires the duchy" penalty.
Also, the ability to make recently conquered duchies to be entirely ruled by city-based counties would probably be nice. I think the trickle-down effect (the cities gain mega-bucks, and the counts pay for a few minor improvements in the poorer castles and *snigger* churches) works, but I could be wrong.
So ... how do I make a resident castle (or city, or *snigger* church) head of a county?