Ambrosia for everyone! Put it on my tab!... oh wait, I don't have one, I'm too rich!
—Ambrosia Count Syrus Kyten
The Ambrosial County of Decidarium, sometimes shortened to the County of Decidarium, was a planetary government of the Ethereal Demesnes based on the planet of Decidarium. It was a voting member of the Diet of the Ethereal Demesnes, where it was categorized as a Theocratic Demesne. There, it officially represented the Ambrosia Counts, a diverse group of thousands of individuals from across the Ethereal Demesnes (and some from the greater galaxy) who were given the title by the Diet, typically along with pension and some land in the Decidarium system, at which time they, and any guests they brought with them, could freely visit and live within the County's borders at no cost.
One of the younger Demesnes, the County was founded deliberately by the Diet of the Demesnes as a territory devoted to the purpose of rewarding the most extraordinary of their citizens. As it developed into a fully independent state of its own, a voting member of the Diet in its own right, this expanded to include individuals from elsewhere in the galaxy as well, albeit rarely. When visiting Decidarium itself, these extraordinary beings would discover the name of the Ambrosial County and Ambrosia Count title was inspired by Ambrosia, a unique product of the planet's ecosystem named for a mythological food. Ambrosia could be processed into food, drink, a basis for clothing and other cloth and fabric products, and various other purposes. As a result, it was sometimes even used as a secondary currency within the County's borders.
By the time of the Cold War, many Ethereal noble families had traditional ties to the title of Ambrosia Count, however many non-nobles held the title as well, even on a limited or indefinite hereditary basis. At this time, the County was still categorized as an Autocratic Demesne, however it was during this period that it was recategorized as a Theocratic Demesne, its more modern categorization, owing to the fact that its non-count inhabitants had by this time become spiritually devoted and motivated on the planet and surrounding star system. The world's culture was effectively one centered around being a vacation resort, and in fact a resort for the general public, as, with the approval of a supermajority of the Ambrosia Counts, the planet's laws were changed to allow visitation by anyone.
A few millennia later, around the time of the rise of the Galactic Empire, Arius Valdayn was one of the Ambrosia Counts and remarked that if he ever married, he ought to take his partner on a trip to Decidarium, to the Valdayn Estate on the planet that his family had owned and maintained since before the visitation law change. Later, when he married Elena Rakusin, this did in fact occur, at which time it was discovered that there was a plot by ex-Imperial forces to burn the surface of the planet apparently motivated by their leader, Moff Michiel Veendrootuiter, having been denied visitation to the planet years before on the basis of an unresolved criminal history.