Oh, wow. This is just begging to be illustrated. It was so beautiful, in so many different ways. I also found myself fascinated by Walburga here, starting with

(biting snuffboxes, the gravy boat that nearly swallowed Remus’ hand, the fifth stair from the top that repeatedly called Sirius a “Blood Traitor Sodomite,” just to name a few)

and continuing on through the suite of rooms and, of course, the solarium. Such brilliant ideas, and so well executed!