This is my Greek Orthodox Jerusalem. I started as the Duke of Cyprus under the Byzantines (Which didn't crumble -immediately-, surprisingly), took Antioch and northern Syria, spread down the coast line until Acre. Then I took the Gaza strip analog (two provinces), and the strip beyond the Jordan river. Egypt was huge and controlled Jerusalem proper and the three provinces north of, but I had enough provinces to declare myself King of Jerusalem.
During this whole game, before I crowned myself, I had to vassalize myself to certain Moslem sheiks and Emirs, but I usually managed to take one of their provinces along with it.
Eventually I attacked Egypt while Alexandria, their capital, was a crusade target. I took Jerusalem, the three provinces, and Alexandria.
I -think- Jersualem is Greek, but almost all my directly controlled provinces are Orthodox (including Jerusalem) and Beirut, Tyre, and Alexandria are Greek culture.
Until my current ruler, I controlled the entire Levantine coast, with a few inland provinces to buff my economy. That was at 12 Intrigue, my current guy has 5. :I
Anywhere, here are the maps. It's a fun game, with oddities like a Republic of Cordoba controlling a large swath of Iberia, Bohemia inherited the Hungarian crown, the Tribe of Ingers is growing, and the Byzantines, while this might change because the Turks have them occupied, are still alive and still control Greece, Serbja, and Anatolia.