Not very far in this campaign, but it's already been pretty wild.
The plan in this one was to start with Haestein, conquer Bretagne and then launch a prepared invasion against West Francia. Afterwards, I would convert to Catholicism and Norman culture (already present in about half the counties in Brittany) and make a kind of 'Kingdom of Greater Normandy.' Unfortunately, the invasion ended in White Peace and not long afterwards I converted to Catholic earlier than intended to put a stop to an Aquitanian holy war.
In the meantime though, I had betrothed my oldest son to a daughter of the Umayyad Sultan who had, through some fluke, become Norse religion. Later she was educated Sunni and the son converted with Haestein to Catholicism, but the betrothal didn't break and the marriage went through. Now they've given birth to mirza, Arab-ethnicity, Norse-cultured Catholic duke of Brittany who will probably convert to Norman at some point in his life.
Of course, now that I'm playing a Catholic mirza dynasty, I pretty much *have* to get waist-deep into the Crusades.