The ekklesia of Christ have no cathedrals in Rome or anywhere else.
Acts 17:24 "The God who made the world and all things in it, since He is Lord of heaven and earth, does not dwell in temples made with hands;
The amazing thing is that people have been deceived into thinking those are cathedrals of the ekklesia. They are actually pagan temples wherein pagan rituals, rights, and ceremonies are performed.
Right. An ekklesia is not a building, It is just a gathering of people summoned (called out) to a meeting for a specific purpose, like that of the guild of silversmiths (Acts 19:24,32) whose source of income was making small statuettes of the god Diana for tourists.
Because it was not a lawfully called meeting (verse 30), the local town clerk dismissed the assembly--in Greek the "ekklesia"--of artisans and sent them home (verse 41).
CB, I know you are aware of this--this is just a comment for the benefit of other participants who do not understand that "church" simply means the meeting of a club when the members are gathered together regarding their common interest.
The place where they meet is not the ekklesia.