Dear friends, The following list is offered to your attention.
Countries consisting of 1 city.
Singapore 🇸🇬
Leader - Lee Kwan Yew

Qatar 🇶🇦
it consists of 1 city - Doha
Leader - Halifa bin Hamad Al Tani

Hong Kong 🇭🇰
Leader - Dong Jianhua

Macau 🇲🇴
Leader - Edmund Ho

Luxembourg 🇱🇺
Leader - Jean Benua Nassau

Monaco 🇲🇨
Leader - Albert 1

They are built according to the example of Venice. No more than 1 city per civilization.

I am also ready to discuss creating a Mod. You can suggest other leaders. We can jointly discuss Unique Unit , Civilization Ability, Unique Infrastructure. I can offer my ideas.

J'ai eu du flair ahah

@Pieppo and @Maur1an: I changed the trait to 20%.
@Demo-Man: sorry i don't do that

hi i love your content and was wondering if you would be able to help me make my own mod? i know exactly how i want it but i don't know how to right the mod exactly.

Yeah, I think it should be:
+100% Science & Culture. Said percentages are divided by the number of cities in your empire

i guess at least 20%

Personaly i like San Marino but i think that the bonus is weak, coludn't be like a 4-5% incrise in Science and Culture?