Citadel of Frost

The Citadel of Frost is an abandoned city located in northern Sassania. It was discovered by researchers from Soohelq during an expedition on Solstember 20th, 49 ABC.
== Overview ==
The Citadel of Frost is a gigantic city, roughly half the size of Ryjestaba, Snowbul in terms of land area. Population estimates vary greatly, ranging from 1 million to 7 million people during its prime. The majority of the buildings in the city are made out of concrete, however it is likely some of the other materials used to create these buidlings have been destroyed. Part of the city has been completely submerged underwater for unknown reasons.
It is likely that this city had extremely advanced technology, far beyond any current society in Schlung. Many weird artifacts have been found in the city that likely involved this advanced technology. The most mysterious, however, are the large robotic limbs that can be found across the city. Gigantic arms and legs have been found throughout the city that are the size of buildings. It is not known how large these robots were or what they were used for.
The city seems to have formed it's own ecosystem as well. A strange blue moss has been found growing inside of buildings, with very different qualities to regular moss. It doesn't just grow on concrete, but it also stains the concrete blue. Biological evidence of new organisms never seen before are very present in this city.
== History ==
Comparing these buildings to the architecture of Mesosilica and Chop Chop, it is evident that the people who lived here were of the same ethnicity, commonly known as the Ancient Sassanians. This city was likely created between 5000 BBC and 6000 BBC. Obviously, these people were descendants of those who arrived from the 1st Voyage in 6000 BBC. It is unknown when this society collapsed but the most popular theories suggest around 5000 BBC.