Vicar of Christ vs Giovanni Angelo Braschi

Vicar of Christ and Giovanni Angelo Braschi both are nouns.

Word	Noun	Adjective	Verb	Adverb
Vicar of Christ	Yes	No	No	No
Giovanni Angelo Braschi	Yes	No	No	No

Vicar of Christ (noun)	Giovanni Angelo Braschi (noun)
the head of the Roman Catholic Church	Italian pope from 1775 to 1799 who served during the French Revolution; Napoleon attacked the Papal States and in 1797 Pius VI was taken to France where he died (1717-1799)