This is my representation of a 6th-century domed, cross-shaped basilica in an imaginary, exemplary late antique city I'm currently working on. This will be my first of many submissions, I hope. Much of the inspiration for this build comes from a paper by Dr. Nikolaos Karydis on the 6th-century church of St. John's in Ephesus, "The Evolution of St. John at Ephesus in the Byzantine Period," as well as Andreas Thiel's insightful book on the same structure, "Die Johanniskirche in Ephesos." These works were seminal in this imaginary church's construction.

(70) The Evolution of the Church of St. John at Ephesos during the Early Byzantine Period | Nikolaos Karydis - Academia.edu
(70) The Vaults of St. John the Theologian at Ephesos: Re-visualizing Justinian’s Church | Nikolaos Karydis - Academia.edu
Die Johanneskirche in Ephesos

Done in Conquest Reforged Refabricated, for Minecraft v 1.19.2, Fabric.