Costa d'Oro
Most Serene Republic of Costa d'Oro Republica Serenissima de Costa d'Oro | |
|---|---|
 Flag | |
| Motto: Semper liberum (Anglish: Forever free) | |
| Anthem: Inno alla libertà (Anglish: Hymn to Freedom) | |
| Capital and largest city | Prospera |
| Official languages | Vetullian |
| Ethnic groups | Vetullian |
| Religion (2023) |
|
| Demonym(s) | Costadoran |
| Government | Unitary parliamentary republic |
| Chamber of the Illustrious | |
| Chamber of the People | |
| Population | |
• 2023 census | 16,349,172 |
| GDP (PPP) | 2023 estimate |
• Total | $1,149 billion |
• Per capita | $70,291 |
| GDP (nominal) | 2023 estimate |
• Total | $1,330 billion |
• Per capita | $81,373 |
| HDI (2023) |  0.962very high |
| Currency | ducat |
| Date format | dd.mm.yyyy (Anno Domini) |
| Driving side | right |
Costa d'Oro, officially the Most Serene Republic of Costa d'Oro, is a country located in Eastern Parthenia neighboring Vetullia.
During Antiquity, Costa d'Oro was populated by Urbin communities until it was conquered by the Remillian Empire, which over time assimilated the natives into their own culture and integrated their territory into the core province of Remillia Ulterior. After the collapse of the empire, the region of Remillia Ulterior saw the rise of several trade-oriented city-states, chief among them Prospera. This metropoli eventually founded a union of city-states known as the Golden League to defend against piracy and foreign aggression in the High Middle Ages. The leadership of Prospera over this alliance further consolidated during the Lower Middle Ages, just as the League was becoming one of the main trade hubs in Southern Parthenia. The commercial hegemony of the League reached its peak in the 15th and 16th centuries, a time at which it boasted one of the largest navies in the continent and was the lending capital of Southern Parthenia.