My query:
> was there a Church in Rome?
Yes, there was a church in Rome, and it became one of the most significant Christian communities in the early centuries. By the time Paul wrote his letter to the Romans, the church had already existed for some time, and its reputation had spread widely enough that Paul had wanted to visit it for years[1].
…
The church’s physical development evolved over time. Early Christians initially worshiped in homes, such as the house church Philemon maintained[3],
————————————————————
My follow-up query:
> was Philemon's house church in Rome as you imply?
I apologize for the misleading implication in my previous response. The biblical text provides no clear indications about where Philemon’s household and church were specifically located.[1] I incorrectly suggested it was in Rome without proper support.
Tradition places Philemon in Colossae …[1]
…
Thank you for the correction—my initial answer conflated Philemon’s house church with the Roman church without warrant from the sources.
——————————————————
It quoted a Commentary on the book of Philemon for the initial response. then note the apology stating "no clear indication" from another Commentary and then stating where tradition placed Philemon from the same Commentary!