Emerald Palace
The Emerald Palace in the Emerald City in the centre of the Land of Oz was the domain of the Land's ruler.
History
Visited by Acquaintanceship
In one universe's version of Oz, which was visited by Acquaintanceship-982, the Emerald Palace and its “gleaming turrets” stood in the centre of the Emerald City. Ozma summoned a great number of Ozites to a room on the first floor to discuss what to do about the theft of the Magic Belt, Magic Picture and Great Book of Records. (PROSE: The Crew of the Copper-Colored Cupids in Oz)
In the 925th Universe
In the 925th Universe's version of the Land of Oz, Oscar Diggs lived in the Palace while he ruled the Land as “Wizard of Oz”. It later became Ozma's palace when she took the throne. Following his stepping down from the position of Wizard of Oz, Diggs fashioned his new home to be reminiscent of his glory days, with a similar omnipresent greenness. (PROSE: A Series of Queer Events)