(Built-in 1.12.2) This is perhaps my most ambitious conversion project which was to convert Marvelfannumbertwo's old Hagia Sophia into a better scaled, and refreshed version. But as of 2 weeks ago, I rebuilt it so that is my building and no longer a conversion. The time is around the early 1900s before the Balkan wars and WW1 and this is similar to the modern Hagia Sophia with the Fosatti additions and restoration.
Original: https://www.planetminecraft.com/project/hagia-sophia-cathedral/