Ba Sing Se is a city with a population of 200000 inhabitants in the land in the north. The city was build 400 years ago by humans. 100 years later 50% of the city population died by a big snow storm. Now there are not only living humans in the city but also other races such as, elves, dwarves, dragonborn and more. The city is surrounded by a wall, as to harbor and protect the citizens. In middle of the city is a large square of 670ft (204,5m) by 1640ft (500m). Next to it is a great temple for the gods. In the northeast and northwest stands a castle.