Which is the oldest European capital city?

Kind of a tricky question because Lisbon became the capital of Portugal centuries before Athens became the capital of Greece, even though Athens is an older city than Lisbon. So the answer depends on how you interpret the question.

it's the oldest continuously functioning capital.

little b, neither have I

I've not been to Athens

Player #25874027, or just which of these is the oldest city.

I would like to go to Athens!!

Lou Lou, Perhaps should have which of these Capitals is the oldest city.