They passed into the Circle of Memories, a round room with ten lamps on the walls, one for each of the ancient Epoch Kingdoms. An eleventh lamp represent the Tranquiline Halls, and a large ceremonial keyhole set into the wall represented the need for ardents to ignore borders, and look only at the hearts of men . . . or something like that. He wasn’t sure, honestly. Sanderson, Brandon (2014-03-04). Words of Radiance (Stormlight Archive, The) (p. 893). Tom Doherty Associates. Kindle Edition. Alright now it's time for my WAG. This is from the Lhan interlude and I think this might be a big clue hidden in plain sight and I haven't seen anyone talking about it so I figured I should. The Circle of Memories as described looks very much like an Oathgate except there is a Keyhole instead of a slot for a Shardblade. And so the theory of this drunken turkey is that this room is a fabrial designed to lock the Oathgates and at some point either Shallan or Kaladin(our only shard bearing raidiants at this point) will have to drop by and turn their shard into a big key in order to unlock the other 9 Oathgates. Thoughts?