The castle itself and its catacombs housed the Rivenroar family (living and deceased) long ago. Some other local families of note used the catacombs as a place of interment as well. These families and the Rivenroars had more than one thing in common. Now the castle and the catacombs
house a much different set of inhabitants than those who built it long ago might have envisioned.
Morrick has claimed that Sinruth and his Red Hand of Doom are using these catacombs as a base of operations.