IMAGE OF MEDIEVAL JERUSALEM
Why not make Jerusalem Shire, be the only shire, on which you can build a castle and a castle wall?
Jerusalem is a very important shire to the whole game and in RP sense. Historically, Jerusalem did had a strong castle fortification.
So my thought is that this should be the only castle that can be conquered? Maybe it should be a bit more expensive than the regular one we have in our capitals?
Maybe it shouldn't be as strong like others but strong enough that needs quite an army to take it?
Any thoughts?