U GUYS
Ok so. I have made a discovery.
There's a place called Chillon, in Switzerland. In French, "Chillon" is basically pronounced the same as 'Shion.' Now, Chillon has a castle in it.
So I present to you....
His Majesty's residence, Le Chateau de Chillon!
(Le Chateau de Shion!)

Maybe I should post about this in the No. 6 location thread. Hah!
Anyway, if you want to read more about the real-life castle, here's the Wikipedia page:
https://en.wikipedia.org/wiki/Ch%C3%A2teau_de_ChillonI've actually been here. It's quite a cool place. Almost tempting to write an AU XD