Chrysopaea

"It sits at the heart of the Wealds of Coral, overlooking the Ancient Mould. I've been there like- once? But gods was it cool" 
-Azanna Beldier 
Chrysopaea, also spelled Krisopae'ah, is an autonomous city-state located in the Wealds of Coral Rift Zone in the Flores Sea. It sits at the top of the Vaelian Crown, a large coral tree that has anchored itself into the ledge overlooking the drop into the Ancient Mould. The city is famous for its its fungally constructed nature, as well as being the gateway to the Mould, one of the eight crowns of Arkon. 
Crysopaea is home to a variety of species, including the undyne, shamurna, squidmen-of-quilambra, and sea elves. Each of the four races elects a duke, who serves for a single 10 year term, and represents their respective race. Additionally, there is the Grand Duke, who is elected every five years by the Crysopaean Chamber of Lords. Finally, the city's growing human population has also been petitioning the ducal council for its own seat. 
The city was founded at an unknown period of Arkon, though many historians point towards the sediment deposits below the Vaelian Crown, where divers have recovered artifacts dating all the way back to the First Era, making it one of the oldest cities in the world (of Arkon). Throughout its history, it has gained and lost its independence multiple times. Since its relocation to Earth in the Convergence, it has been a member state of both the Undyne Confederacy and the Republic of Indonesia, though has managed to maintain a semi-independent status from both.