Located in the absolute centre of the land of Oz, this city rises from a verdant landscape, at. The centre of the spokes of yellow brick roads, and echoes those themes in being build from green glass and emeralds and decorated with gold.
Within the walls of the city, the buildings are much more normal colours, but everyone (and particularly natives) are exhorted to wear green-tinted spectacles.
The ruler of the Emerald City is referred to as The Sorcerer.
The previous defenders of the realm were the Witches: Mombi of the North, Witch of the EastBastinda of the West and Witch of the South
While in the environs of the land, people from other realities do not age. The native flora and fauna age as normal, but it would be possible to live several lifetimes here without suffering decline.