which aspect of the roman catholic church established in the 300s remains today?\nthe roman catholic churchs…

which aspect of the roman catholic church established in the 300s remains today?\nthe roman catholic churchs leader is still the bishop of rome, or the pope.\nthe roman catholic church remains the official church of the city of rome.\nthe roman catholic church remains the only official church.\nthe roman catholic churchs power structure remains unchanged.
Answer
Brief Explanations:
The Roman - Catholic Church's leader has been the bishop of Rome (pope) since early times and this continues today. Rome no longer has an official state - church, the Roman - Catholic Church is not the only official church in any modern country, and its power structure has evolved over time.
Answer:
The Roman Catholic Church's leader is still the bishop of Rome, or the pope.