This is the 175th most frequent Italian word.
napoli
Napoli: Naples, a city in southern Italy.
Here, 'Napoli' is used as a proper noun, referring to the city of Naples.
Napoli è una città molto famosa in Italia.
Naples is a very famous city in Italy.
In this context, 'Napoli' is used as an adjective describing the style of pizza, implying origin or tradition.
La pizza Napoli è una delle più apprezzate nel mondo.
The Naples-style pizza is one of the most appreciated in the world.
Here, 'Napoli' again refers to the city, used in a location expression with the preposition 'a' indicating movement towards.