Costa d'Oro
Most Serene Republic of Costa d'Oro Serenissima Repubblica 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 Golden League reached its height in the 15th and 16th centuries, a time at which it boasted one of the largest navies in the continent and had become the banking epicenter of the Christian world. The following centuries would be marked by a slow decadence. Banking institutions spread to other major cities of the continent, leaving Prospera as a merely regional financial center. Other more heavily populated countries also began to form under the banner of ambitious monarchs, and the competition among powers for naval expansion left the Golden League with a small armada to defend its interests abroad. The early industrialization of countries such as Angland or Eisenland left the artisan manufactures of the League in an even more precarious position. The growing disenchantment among the population materialized in a liberal revolution that overthrew the old guildmasters and renamed the Golden League to the Costa d'Oro (Anglish: Golden Coast), the customary name of the region where the union sat.