What is the proper noun for the common noun city?

A proper noun is the name of a person, place, thing, or a title.

Some examples of proper nouns for the common noun city:

• Athens, Greece
• The Bay City Times of Bay City, MI
• City Beer Hall, Albany, NY
• 'City Lights', movie 1931
• City Towing Inc. Billings, MT
• Oklahoma City, OK
• Paris, France
• City Manager Marc Ott, City of Austin Texas