A more thorough explanation:

Urbs

Urbs is a Latin word that means a city or town. It can also refer to the city of Rome.

• New York City is a bustling urbs with millions of people.
• The ancient urbs of Rome was once the center of a great empire.

The examples show how urbs can be used to describe any city or town, as well as the specific city of Rome. It is a term often used in historical or legal contexts.