Konigsstadt

Konigsstadt is the Capital City of the Spitzevolke republic. It is the largest City of the Sinistrian continent, featuring an undercity at ground level and an upper city above. Konigsstadt boasts a complex system of canals and waterways, allowing trade and commerce to flow through the city via the river Fjellvann.
The city foundations, sewer system, and catacombs were built by a collaboration of dwarves prior to @The Koloss Conflict, with the intent of eventually creating a united city state that each of the disparate Dwarven Clans could call home. The region was originally swampland until the Dwarves dammed the rivers The Fjellvann and The Bergwasser , creating a complex series of canals and waterways. This allowed them to run shipments of rock and iron from Rodfort The Red Keep in The Jerntopp Range and marble from the quarries near Varmbad  and filter them around the area of the city site. The initial foundations were laid before the Spitzevolke arrived on the continent, but production was temporarily halted when the Spitzevolke invaded the dwarven fort of Rodfort. It began again soon after, with the intent being that it would come to house the now disparate Redaxe clan.
When the Koloss conflict erupted, the project was all but abandoned in order to see off the threat of the Kolosskopf giants. During @The Great Betrayal, Gunther Kriegrich's forces invaded the region, and used the foundations the dwarven clans had put in place to build the city as it is seen at present.
Few dwarven-built buildings remain at ground level, with notable exceptions including the Königssaal, a large chamber which formed the central structure of Castle Friedrich. To this day, the Konigsaal is the meeting place of the Spitzevolke Council, previously the throne room of the Friedrich dynasty, and before that, the meeting place of the Sinistrian alliance.
Though the city's sewers operate with remarkable efficiency, it is thought that only 5% of the underground tunnels and catacombs of the city have been mapped out. Any of the original plans of the city's sewer system have been lost to time, and the lower sewers remain a dangerous curiosity of the city's denizens, where few dare to venture.