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8799 Knights' Castle Wall is a Knights' Kingdom II set released in 2004. It comes with the walls of Castle Talonjay, which is in the province of the same name where Jayko lives. It includes Jayko, Santis, Rascus, a yet unknown golden heart of a shield and a cauldron containing rocks.
This set was also included in K8800 Vladek's Attack Kit.
The tower above the gate is little more than a facade. There's not much room to place any minifigures besides a niche at a window and the platform at the top. The rest of the wall is connected to the tower via hinge bricks. On one the crenels of this wall segment is a hinged cettle, which can be used to drop stones on attackers.