It was originally simply the Bishop of Rome.

一开始，教皇其实就是罗马主教。

youdao

The see of the pope is namely the bishop of Rome.

罗马教皇，即罗马的主教的教座。

youdao

The Bishop of Rome hath no jurisdiction in this realm of England.

罗马主教上帝没有管辖权在这一领域的英格兰。

youdao

"As you know, the duty of the conclave was to appoint a new Bishop of Rome, " he said.

CNN: Pope Francis, the pontiff of firsts, breaks with tradition

In applauding the plaque honoring John Paul, Francis also paid tribute to a pontiff who enthusiastically embraced his role as bishop of Rome.

NPR: Francis Honors John Paul II Before Installation

In a light-hearted moment, he said his fellow cardinals had gone to the "ends of the Earth" to find a bishop of Rome.

BBC: Argentina's Jorge Mario Bergoglio elected Pope Francis