I hope I get to reuse the background in panel one sometime, because I spent a lot of time on it and then covered up some of it with a couple of word balloons. I drew a version without the flags just in case.

Again, I'm steering a little closer to John R. Neill's version of Emerald city (while amping up the cartooniness) than the MGM-inspired versions you usually see. Part of it's also inspired by Princess Peach's castle in Super Mario Brothers. The flag of Oz is on top.

The palace is a government building, but it's also a bit of an apartment building with lots of rooms for all the characters who show up in the later books. The dome on top contains the dining hall where all the parties are held, as I always imagined it being inside the palace. I doubt it got much use under The Wizard's lonely reign.