The world.
The White Islands are a small archipelago of four islands North of the Meidia Continent. In ancient times, it was home to the Willian people. Then it got colonized by a group of Numphlings which came from the inner sea of Meidia and across the mainland.
Then Borean incursions started, and some of them finally established. These waves of people's migrating over the centuries left the White Islands a very diverse and cosmopolitan place. Five centuries ago, Iriam the first managed to conquer and unify all people's in the White Islands under a single crown. Thus the newly formed country of Albus set out to explore, colonize and conquer lands across the Ocean while looking for the riches of Amato. Trade with Amato brought some Lomari immigrants that quickly integrated into the society.
Ondinium was the seat of power of the Crown and it grew prosperous. But all golden ages have to end. The first blow was losing a war overseas with the kingdom of Kenraikh over the control of some colonies in the north of Anwa (The western continent). Then the remaining colonies rebelled, and while Albus managed to hold onto its colonies, the war effort weakened its economy.
Losing the whole armada in a war with Berin was the killing blow. Local nobles everywhere seized the chance to assert their own autonomy and ignore the Crown. Albus quickly fractured as a result, and the royal family lost their grip on the White Islands, eventually even Ondinium had to declare itself a free City in order to maintain trade and avoid getting invaded by the newly created fiefs around. The Royals finally retired to their ancestral fief where their powerbase remained mostly intact.
Nowadays, Ondinium remains a prosperous port which trades with countries everywhere. However, it lives in the shadow of the powerful Amato empire (The Sun empire), and the newly created Neo-berin in Anwa (The Moon empire). Both keep agents in the free city, and typically use it as a ground for proxy wars.
This message had punctuation tweaked by the GM at 17:52, Thu 29 Oct 2020.