Final answer:
The typical Byzantine church with nine bays features a large central square bay with a dome and smaller square corner bays with domes or vaults, exemplifying the centrally planned design common in Byzantine architecture.
Step-by-step explanation:
The typical plan of a Byzantine church with nine bays is a large square bay with a dome in the center and smaller square corner bays with domes or vaults. This design reflects the Byzantine preference for centrally planned churches, which often featured a dominant central dome and secondary domes or vaults around the periphery. A prime example of this is the church of San Vitale in Ravenna, Italy. Unlike the longitudinally-oriented basilicas of the Western Roman Empire, Byzantine churches emphasized verticality and a centralized plan conducive to mystical and symbolic interpretations of the space.