In THK, Prince Baelor suggests Dunk’s legal team use tourney lances rather than war lances. Is this genuinely a smart move, or GRRM pulling a weird fake-smart thing (like ‘light’ chainmail or all-black camouflage)? If yes, is this something people did more often (IRL)?

In order to allow for drama, GRRM has decided to ignore the rule (medieval jousts were highly regulated, more so than many professional sports today) that lances had to be “de mesure” (of an equal length as compared to a standard used by the organizer of the tournament). 

I know it’s not a historically accurate film, to say the least, but in ‘A Knight’s Tale’ the Black Prince transparently bluffs that his heralds have discovered noble blood in the peasant protagonist’s ancestry and consequently knights him. Did such declarations occur and would they be likely to be believed/accepted?

There are certainly examples of rich merchants buying their way into the nobility, and faking their ancestry

Edward the Black Prince fighting in a tourney in France literally as the Battle of Poitiers is being fought is probably the bigger fudge, but if strict accuracy was required, it would have been more plausible if William Thatcher was a merchant’s son. 

Do you think when the Others come south they will spread through the land beyond the North, like they were doing north of the Wall, and attack all over Westeros raising corpses left by human wars? Could the dead of the fight against the Boltons and the Whispering Wood or the Red Wedding for example become part of the army of the dead? It would seem chillingly perfect.

I don’t think the Army of the Dead will reach the South – I think Winterfell will hold it in place because that’s what it’s for. (The South has its own problems in whatever Euron’s up to.)

But I love the idea of the first sign that the Army of the Dead has come to Winterfell is the dead of the Battle of Ice rising. Unless Stannis thinks to burn the bodies…

How big is Harrenhal? Can you establish the dimensions of it? Is it possible to compare with other castles and landmarks of Westeros and the real world?

Harrenhal is enormous: if it’s three times the size of Winterfell, that means it’s 270,000 square meters. That’s almost as big as the Palace of the Parliament (the world’s largest civilian administrative building in the world, built by Ceausescu), and slightly bigger than the Hofburg Palace in Vienna, bigger than the Louvre in the France, and so on.

If we’re going by castles alone, it is almost four times the size of Prague Castle, the largest ancient castle in the world. So you can see why it’s such a white elephant.