Hagia Sophia & All Cathedrals Enabled For All Christians
Hagia Sophia, Cologne, and Canterbury Cathedrals are now enabled and can be built by all Christians. In vanilla the Cathedrals have a requirement that they must be a Holy Site of the holding faith, meaning Catholics can’t celebrate Mass in the Hagia Sophia, nor can Orthodox build Cologne or Canterbury Cathedrals. This removes the requirement that the holder’s faith must have the barony as a Holy Site, and replaces it with the broader pool that they must be a member of a Christian religion.
Your Catholic Latin Empire or resurgent Orthodox Roman Empire is no longer hamstrung when they reunify Christendom’s great holy structures, nor is your clodpoll heresy denied access to the big city buildings when they graduate from the cornfields and swineries to become masters of Europe.
Note: Notre Dame in vanilla already only requires that the holder be of a Christian religion, and that they have the Windmill innovation.
Thumbnail is a Seraphim mosaic from the Hagia Sophia.
See Also:

Sanctify and activate every holy site for every faith. Deactivate and exile every other faith from every holy site.
See Also
My Collection of CK3 Fixes, Features, & Reworks
Revisions:
Old revisions of this mod are available below. Click the link to download.
