So to keep you updated, I'm currently working on religion spread. The goal is to make automatic spread more accurate while avoiding determinism.
As we finally got to the religions I want to remind everyone about catholicism-orthodoxy chicken-egg fix suggestions I made a while ago:
# Orthodoxy founded with Theology
Catholicism:
# founded when the Apostolic Palace is built
# Orthodoxy is being replaced with Catholicism (with temple conversion) according to priority list beginning with historically Catholic civs. Human player can chose only if he was not the one who has built the Palace.
# Catholic holy city is logically the city with Apostolic Palace!
Church of the Holy Sepulcher will be very logically the Orthodox Shrine. Today it serves as the headquarters of the Greek Orthodox Patriarch of Jerusalem, while control of the building is shared between several Christian churches of Eastern Orthodoxy and Oriental Orthodoxy(Armenians) as well as by Roman Catholics.
St. Peter's will fit nicely next to Apostolic Palace as a Shrine for Catholics. St. Peter's Basilica is the most renowned work of Renaissance architecture and remains the largest church in the world. If any Cathedral is worthy to be a Wonder in our game -- St. Peter's can fill the bill. And yet Mod representing World's history does not have it for players to enjoy .
Sistine Chapel, which is a Chapel in ... Apostolic Palace, might require the Palace to be built, although I mention the Chapel as a side note, it is not my focus at the moment.
Finally Hagia Sophia, again very logically, cannot be Orthodox shrine and will go back being regular Wonder with any effect, including the vanila one. Why it should not be a Shrine? Well, shrines in the game are associated with particular religion, whereas Sophia was converted to mosque and then to museum in real life. NO matter how many turns you play our Shrines never convert. So let's reflect that.