The bustling, corrupt port city of the island nation of Kerch, and the primary setting of the Six of Crows duology. A centre of international trade, banking, and vice, Ketterdam is home to the Exchange (a stock market), the Barrel (the lawless entertainment district controlled by criminal gangs), and the Church of Barter. The city runs on commerce and operates with few moral constraints - everything has a price in Ketterdam.