City-states since the 20th century

Can you name all the city states that existed in the 20th century or still exist today?
Source: https://en.wikipedia.org/wiki/City-state#20th-century_cities_under_international_supervision
Quiz by LordDanBed
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Last updated: August 13, 2020
First submittedAugust 12, 2020
Times taken19
Average score16.0%
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20th century
Danzig
Fiume
Jerusalem
Memel
Shanghai
Tangier
Trieste
West Berlin
Modern
Monaco
Singapore
Vatican City
Modern non-sovereign
Basel-Stadt
Berlin
Bremen
Ceuta
Gibraltar
Hamburg
Hong Kong
Macau
Melilla
Proposed
London
Montreal
New York City
Ottawa
Toronto
+1
Level 67
Aug 12, 2020
If you have places like Gibraltar and Hamburg, maybe the City of London should be in here as well? Very nice quiz, by the way!
+1
Level 54
Aug 12, 2020
Thanks :) According to the source, London is only proposed. The same goes for example for New York. Thats why I excluded them from this quiz
+2
Level 67
Aug 13, 2020
But your source mentions London, while I was talking about the City of London, which is a different entity altogether, with a different mayor and all (it's also much older than the UK itself!). You can look it up if you want
+1
Level 54
Aug 13, 2020
Adding the proposed city-states from the source as well