Hello samiosuso,

It sounds interesting.

But it also sounds like what we call a Single Player Interactive History.

This is what I have formed (in my mind) from what you mean.
There is a Game Master who writes up a Chapter every now and then, with a list of decisions (?) for each Player, the Player PM's those decisions to the Pope and he writes up the next chapter.

Is this spot on? It sounds good, you should have a poke around the Chapter House, you will probably find some similar things (If I am right) And welcome to the .Org and the CH!