Bishop of Rome vs Lorenzo Ganganelli

Bishop of Rome and Lorenzo Ganganelli both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bishop of Rome	Yes	No	No	No
Lorenzo Ganganelli	Yes	No	No	No

Bishop of Rome (noun)	Lorenzo Ganganelli (noun)
the head of the Roman Catholic Church	Italian pope from 1769 to 1774 who lost whatever support remained of Catholic Europe, causing the church to fall into the hands of secular princes (1705-1774)