Vasious said:The Schism was less than 20 years old, perhaps not so in grained at that point, if you were not a major player. Afterall it was not a heretical difference, but it seems more like a political difference resulting from the cultural differences. In fact it was more subordiantes squabbling and excommunicating each other as opposed to the churchs as a whole.
Is this historically plausible? well the boarder Kingdoms/territories could have swayed between the two depending on the Political advantage/playing both ends against the middle. Or even just the whim of Rulers, as they do. A later period but how many times did England change it state religion?
Good topic. In 1066 the schism was indeed a new thing, something not quite yet permanent, with the slightest possibility of being healed. Popes like Urban II and, it would seem, the Emperors and some of the Orthodox clergy had an interest in healing the schism to facilitate aide to the besieged Roman Empire. Unfortunately this was not to be, mostly due to political/military affairs and mutual distrust, but it was possible depending on the personalities of the time. As to your question on border territories: Bosnia/Serbia, most of the Balkans really, and parts of Eastern Europe were areas of competition between Catholic and Orthodox missionaries and the supremacy of one or the other was hardly guaranteed. Bosnia actually ended up with a hybrid church in the late medieval period, referred to as the Bogumil Heresy, due to this competition and the country's position as a crossroads of Catholic-Orthodox influence. It'd be interesting to see the proselytizing competition in-game, and I suppose it's already possible considering who conquers the relevant regions.