The glorious marble interior of Australia House became the interior for Gringotts, the wizards bank run by goblins in the Harry Potter films. You cannot go inside, but by briefly looking through the glass doors, you can see the magnificent crystal chandeliers that are a prominent feature of the Gringotts banking hall in the films.
“Well, there's your money, Harry, Gringotts, the wizard bank. Aint no safer place, not one, 'xcept, perhaps, Hogwarts.”
- Hagrid
London: Endlessly Entertaining!