
Originally Posted by
Swuboo
Wrong holder type is -75% to income, and it will apply to every bishopric or city that you hold directly. With cities, you're generally much better off handing them to a mayor. With bishoprics, you run the risk of getting no income at all if the bishop likes the pope or patriarch better than he likes you—bishops pay their taxes to whomever they like better.
If your territory is small, you might be better off holding everything personally, but once your kingdom is large you'll probably want to stick to castles rather than wasting demesne limit on cities or bishoprics.
As far as I know, the ring button will show you everyone who would be willing to accept either a marriage or a betrothal. I could be wrong, though. It's definitely not filtered by religion, though—I've seen everything from Cathars to Tengrists on there.