Moving carefully through the west exit, the group follows Iasu. They move tactically in full battle readiness, looking for any sign of ambush or confrontation.
After moving through several underground halls and down one stretch of stairwell, Iasu leads into a room that breaks open larger than the rest, with the ceiling raising high again, similar to that in the great hearth room.
This room is a mix of high design and natural stone, as if the large chamber was mostly finished, finely cut in the bedrock of the earth beneath the palace above. But then parts of the room are still large outcroppings of uncut rock. It is impossible to discerned if this was intentional by design or a result of a halted project. It was built in a past age and its story is lost.
Littered on the ground are huge rectangular blocks of stone, all of which have etching upon them. The enormous weights are cast about in disorder, some laying tilted atop of one another. Most would be waist or chest height if stood up straight next to a man. It would take a team of pack animals or dozens of slaves with rope and chain apparatus to move even one of the blocks. It is hard to imagine what would have knocked them all astray here in this space as they are.
But whatever happened must have happened long long ago. As with the other rooms in the Adriyalet House, everything in the room is covered with dust, grime, webs, filth. Signs of rodents and bugs. Another setting of neglect and degradation.
In a back corner, offset from center on the lengthy western wall of the grand chamber, Iasu points it out...
The Eagle Door.

OOC:
For sizing reference, the top of a tall man's head would reach up to nearly a foot under the central circular piece of the door. That means the top of the door is somewhere about 13 feet high.