Harrenhal is not in the North.
Joffrey made you the Lord of Harrenhal.
We return to Harrenhal now.
Clegane, you will maintain a Garrison here at Harrenhal.
While you held court in the ruins of Harrenhal.
We should set the siege lines 1,000 yards from Harrenhal.
When King Robb left Harrenhal, his mother was his prisoner.
Harrenhal was built to withstand an attack from the land.
As restitution for this betrayal, he demands Harrenhal and all its attendant lands.
In Stark's absence, Roose Bolton holds Harrenhal, which would seem to make him Lord of Harrenhal.