This is the same in every country though? There are plenty of old cities in Sweden.
My suggestions for indy cities in Sweden, in rough order of preference (not all of these at the same time, of course!):
View attachment 295083
Uppsala:
Founded before the game's start.
Pros: Has
always been one of the most significant cities in Sweden, still is. Oldest university in the Nordic countries. Has a wonder associated with it. If you want one city to represent Sweden pre 1250, this is it.
Cons: Somewhat close to Stockholm. On top of a timber resource with the current map. Fairly low on food.
Kalmar
Founded in ~1100.
Pros: Historically significant Hanseatic city, has a wonder, the Kalmar Union. Good spot.
Cons: Was eclipsed in the 17th century by Karlskrona.
Åbo
Founded in ~1250.
Pros: The capital and most significant city of Finland until the end of the game's timeline. AI Sweden badly need a city in Finland to flip to them, they never expand well there (and they
did historically, all of Finland was conquered by 1300). Even today Åbo is majority Swedish speaking.
Cons: Somewhat late spawn. Will require tweaking Sweden's flip area.
Skara
Founded in 988.
Pros: Main centre of Christianity in early medieval Sweden. Major city during the middle ages, main historical city of Westrogothia.
Cons: Lost most of its significance by the time the Swedes spawn.
Linköping
Founded in ~1100.
Pros: Main historical city of Ostrogothia, old centre of learning.
Cons: Spot close to Kalmar, not as significant as the others.