So, I'm listening to Deathly Hallows during lunch. Chapter ? Xenophilius Lovegood. Noticed something I hadn't before. Obviously, there is that headress Xeno is making to recreate the diadem of Ravenclaw and that is a clue to what the penultimate Horcrux is, but there are clues throughout the scene that also tell us where the Horcrux is, how it will be found, and how it will be destroyed.
First of all, Lovegoods are Ravenclaws, in the sense that they are the quintessential Ravenclaws, just as the Malfoys are the Slytherins, and the Weasleys are the Gryffindors. Each house represents one of the four elements: Hufflepuff- Earth, Gryffindor- Fire, Slytherin- Water, and Ravenclaw- Air. I couldn't figure out why Lovegoods house was shaped like a rook for the longest time. The tall, round house points to the airy tower which houses the Ravenclaw common room in which is the statue on which Harry sees a representation of the Horcrux.
Second, the trio go up onto the house's second floor, which is so cluttered that it reminds Harry of the Room of Requirement when it transformed itself into a "gigantic labyrinth comprised of centuries of hidden objects." That of course is exactly where the diadem Horcrux was hidden.
Finally, the house ends up exploding in the end destroying the headress, which is pretty close to what happens to the Room of Requirement and the real diadem with fiendfyre.
Good, eh? It parallels Slytherin's locket being found in a WATERy underground cave, just like the Slytherin common room is watery (under the lake to be precise). And Hufflepuff's cup in the underground, EARTHy vaults of Gringotts like the earthy underground common room of the Hufflepuffs by the kitchens (think hobbit hole). The Sword of Gryffindor being different from the rest, of course because it destroys Horcruxes and wasn't one itself. I loved that it was Ron that got the sword a la King Arthur. Arthurian legend being embodied in those fiery, redheaded, Gryffindor Weasleys. But that's another can of worms.
