"A Gruesome Lock"

Before you enter the room, dominated with tall pillars, you notice the pristine floors. The dungeon stairs leading to this room are black with the blood of victims dragged into this room a century ago. That discoloration ends at the threshold of this room. The stone floor of this room is an unblemished grey. Upon closer inspection of the floor, you find fine grooves, expertly carved into the floor. These grooves spiral around the room, like a labyrinth, and climb up the eight tall pillars.

The pillars rise at varying heights and surround a central circular shape fitted into the floor of the room; this reminds you of either a central stage where the pillars are onlookers or the circular stone in the center of the room is a cap of a sealed drain. From the entrance of the room, that central seal appears to have strange designs of its own carved into its surface.

The four pillars, rising up thirty feet, stand to the north east, south east, south west, and north west around the room’s central circle. Between them, to the east and west, stand two other pillars, also thirty feet high. The pillars to the north and south stand closest to the room’s center; these stand fifteen feet in height.

The walls of the room, which climb high and conclude in a dome, do not share the pristine color of the floor. Instead, caked into the walls, are layers of filth. Here and there, beneath the filth, the visage of a stone face, grimacing in rage, can be seen. Looking up and around the room, there must be an impressively massive relief carved into the walls and ceiling. Despite the centuries, a pungent stench of rotting death emits from the walls. 

Imagine these faces, more spread out, covering the walls. Those who make a "history check" may be able to tell the nationality of the faces.