People who have seen Marinburg often say it's a giant beast devouring gold and seawater.
The resident population of Marinburg is about 150,000, but the actual city population may be 500,000 or more. Ever since the "Savior" Ludwig allowed Marinburg's independence 150 years ago, the city has developed rapidly and chaotically as if it had been unshackled. Every day, more buildings emerge, built upon existing structures, even on bridges and in shallow waters. Each day, more criminals dig deeper tunnels hoping to smuggle precious items through them. The originally clearly planned district layout of the city becomes blurred, and the influx of more people gradually turns Marinburg not just into a city but a large urban conglomeration.