Ketterdam is a fictional city in the Grishaverse, created by author Leigh Bardugo. It serves as the bustling capital of the country of Kerch, known for its vibrant trade and diverse population. The city is characterized by its canals, cobblestone streets, and a mix of cultures, making it a hub for merchants, thieves, and adventurers. The city is also home to the infamous Dregs, a gang led by the cunning Kaz Brekker. Ketterdam's economy thrives on trade, smuggling, and the lucrative business of Grisha magic. Its dark alleys and lively markets create a rich backdrop for stories of intrigue and ambition.