This is a Minecraft representation of the Sydney Museum of Modern Art located on Circular Quay. Sydney, Australia. The real structure consists of two buildings joined, this Art Deco part and a modernist part not reproduced here.
This is an old build, done 3-4 years ago to see of the elements of the Art Deco style could be captured in Minecraft. The inside is very bland, mostly just empty floors joined by a ladder, no stairwell. Feel free to add stairs and rooms if you like. Also, this was built before stained clay was available, so you might want to try using MC Edit to replace the boring stone with beige stained clay. A look at the real structure on Google Streetview is advised.