|Neighbours||Ephebe, Istanzia, Betrek, Ushistan|
|Geographical Features||Vast desert.|
|Type of government||Used to be a theocracy, changed after the 8th Prophet|
|Notable Citizens||Vorbis, Brutha, Visit-the-Infidel-with-Explanatory-Pamphlets, Mightily Oats|
A powerful and oppressive theocracy until maybe a hundred years before the present, worshipping the Great God Om. Historially, Omnia used to conquer neighbors in His name, all over the continent of Klatch. The Omnian Quisition, a state secret police run by deacons, used to torture and execute Omnian citizens in His name. Peddlers have sold dubious religious artifacts in His name. Everything and anything done in the light or in the dark were done in His name, but He wasn't paying attention to what his worshippers were doing. This theocracy was run by the Cenobiarch (the Superior Iam) with 6 Arch Priests, 30 lesser Iams and a numerous other clergy to assist him.
Despite, or rather because of the terrible authority of the church, by the time of the coming of the Eighth Prophet of Omnianism many members of the Omnian government and military had in fact joined a secret society of apostates, and Om Himself had dwindled in power to abject helplessness. The details of the ensuing reformation are recorded in Small Gods.
Nowadays, Omnia is quite amiable, its priesthood spending its time arguing among themselves over each phrase of the holy scriptures rather than torturing accused heretics and its missionary zeal redirected from holy war to peaceful evangelism. The Eighth Prophet of Omnianism, Brutha, had brought all that he could memorize of the books from the destroyed Library of Ephebe back to Omnia, set them down in writing again, and opened a new library to scholars and philosophers of all nationalities and faiths. Nowadays it sometimes seems that half of the Ephebian philosophers are living in this library.
Despite these radical reforms, people of other nations still harbor a good deal of resentment toward the Omnians. Those who don't keep up with the news think that Omnians still set fire to non-Omnians (see Carpe Jugulum), and those who do keep up with the news are fed up with getting a pamphlet every day from their Omnian-immigrant neighbour (see the article on an exemplary emigrant, Visit-the-Infidel-with-Explanatory-Pamphlets, who currently lives in Ankh-Morpork).
The currency of Omnia is known as the Obol.