Australia House is a Belle Époque‑style landmark on the Strand, designed by Alexander Marshall Mackenzie and built from 1913 to 1918 as the first major public building of the new Commonwealth of Australia. Opened by King George V, it is the oldest continually occupied diplomatic building in London and serves as the Australian High Commission. The marble‑lined Exhibition Hall, with its soaring columns and chandeliers, doubled as Gringotts Wizarding Bank in the Harry Potter films, though the hall is usually reserved for official functions. The building is an architectural jewel and a symbol of enduring kinship between Australia and the United Kingdom. Visitors cannot enter, but weekday glimpses through its glass doors reveal the opulent banking hall where goblins once welcomed wizards on screen.