Astapor is one of the three great slaver cities in Slaver's Bay, a region located on the continent of Essos. It is an ancient and dilapidated city, its glory days nothing more than a memory. Red bricks dominate most of the city's architecture - the red of the bricks is said to come from the blood of the slaves who made them. Astapor is the only place to purchase Unsullied, young eunuchs who are trained to be fighters since young. The training takes years, and only a third of the boys survive the brutal tests. The Good Masters are the most powerful slavers in Astapor, and they lie safe in the city knowing that they can always call upon the Unsullied to defend the city against any threats that comes their way.