Tangramayne Keep is located on the river north of Corinth, just to the south of Lake Tangramayne. The surrounding area is hilly and was sparsely populated even in good times.

Physically, the Keep consists of a walled bailey with some interior buildings, and a three-story tower keep.

The Keep is now unoccupied, to the best of my knowledge.

The Keep was built by Corinth to guard both the river passage from the mountains and the nearby silver mine. During prosperous times, it kept the river open as a trade route from the Dwarven settlements in the mountains proper. It was manned by Corinthian troops, who rotated through the post periodically.

Frederick was stationed at the Keep, prior to the Forsaking, though I am no longer entirely clear on exactly how or when he left service there.

When we first approached the Keep, it had the semblance of normalcy, but it quickly became apparenty that all was not well. It had, in fact, been overrun by devils and undead. The majority of both were of the minor variety, but the leader was rather more formidable - a Hamatula, I believe. It had a Celestial bound in a summoning circle near the top of the keep.

The imprisoned celestial was an Avoral from Cille's retinue. She (Cille, that is) thanked us for our help in rescuing the Avoral (and also purged the remaining enemies from the keep). This was our first encounter with Cille - who was a Planetar at the time, not a Solar.

Reconstructing the story in the aftermath was rather difficult, and details here will wait until I have it more clear.