The Capital of Cardolan

[Inziladun]

Originally Posted by Gordis

I would guess the capital of Cardolan was either Tharbad (the biggest and the oldest city in Cardolan) or the fortress on the Barrow-Downs, whatever its name may have been:

I think Tharbad was more likely than the Downs, as it doesn't appear that there were any structures at Tyrn Gorthad, except the barrows. Frodo and Co. failed to mention seeing any evidence of a ruined fortress.