One of the walls, covered by a black velvet curtain, facing their balcony was made entirely out of transparent glass - a marvel her husband had made. Even the new glassblowers that had settled in Wintertown, easily rivalling those of Myr in skill, couldn't make something like this. Not only was the glass unbreakable, but it was only transparent from the inside - if you tried to take a look from the outside, you'd only see unending darkness. Not that anyone could ever reach the balcony from the outside - at the very top of the new Great Keep, it was more than three hundred and fifty feet above the ground, and all the walls of the holdfast were as smooth as silk and unbreakable, impossible to climb even for the most daring of souls. However, because of the pristine snow-like colour of the fused stone, many had begun calling it the White Keep instead.