Originally Posted by
Cleretic
Honestly I find it sorta funny that they deliberately avoided giving us a straight, non-abstracted view of Alexandria Castle; it's gone in Heritage Found, it's not directly shown in the dungeon, we only see a Disneyland-style cutesy version in Living Memory. Because of course they can't show a FFIX-accurate Alexandria Castle, people would just go 'but that's Alexander'.
Also, while we don't know the specifics of the Enigma Codex, I think the implication is that it itself is part of the time paradox; like how the legend of the Hotgo that the Wandering Minstrel pulls from was Mide and Dayan's history made legend, the Enigma Codex is an account of the events of Alexander, being mistaken as blueprints for the machines within Alexander.