Does the Ire fortress remind anyone else of the fortress in the middle of the Purelake in one of Dalinar's visions? A random fortress in the middle of a giant body of water? They could be related, but then again the Ire all seem to be from Sel, not from Roshar.
Though Kelsier did explicitly say that the bricks to build the fortress all must have come from somewhere else. Maybe the Elantrians picked that fortress up from Roshar and plopped it down in the ocean on Scadrial because part of those bricks' "identities" involves them being in a giant body of water? Might make the fortress more solid.
