I am from Europe. In Europe is very uncommon for two cities to be named the same across two different countries/regions.
Clearly if I'm asking such question it means the answer is not obvious to me.
To you and the other 3 persons that downvoted my comment:
You are implying there is such thing as a stupid question.
You should know better.
I am from Europe as well, but I'm not sure how relevant that is. I regret using the word "obvious", I should instead have said "it can safely be assumed that it's the city that's much larger than the others that is being referenced".