Allagan Empire

[Nalien]

Not really, the allagan empire was opposed to all primals, they possibly sealed them and had anti-primal weapons ( Ultima, Omega ), they were more or less what garlemald is now. Therefor you won't see any sign of a primal in their buildings.

It's mostly silly for the potential implications for characters like Midgardsormr;

The legend, as told by Erik, states that, "There was the birth of Althyk, god of time among the Twelve, and in turn, His younger sister Nymeia, goddess of fate. And then there was water, and through it the Silvertear Falls came to be at the center of all that was. Here was the source not only of water, but the fount of all magic as well. Now, when water came into being, so too did the great dragon Midgardsormr. Brother Time and Sister Fate, fearing the Falls might fall into the hands of evil, ordered Midgardsormr their protector and warden. Much later, with the arrival of man, would Midgardsormr be worshipped as the guardian deity of Silvertear Falls."

Now, if Althyk and Nymeia were Allagan survivors, that puts this legend in a new light. Instantly it would dispute the idea that Midgardsormr fathered Bahamut, and instead make him out to be something more like the last survivor of Meracydia, though perhaps he existed prior to that and upon the survivors of Allag returning to the location which caused the latest Calamity, a deal was struck; He would ensure the Tower is not misused again, and they would leave his kind alone. This could explain his presence at the Battle of Silvertear Skies, Garlemald was looking to occupy Mor Dhona and considering the events at Bozja Citadel (Silvertear Skies was 15 years ago, in 1.0 (before a 5 year time skip) Bozja Citadel was described as occurring 10 summers ago, iirc), their intention certainly would seem clear to Midgardsormr, hence the aggression.

Another mundane aspect of the Twelve is their rivalries, Halone is said to be a bitter rival to Nophica. This perhaps indicates that they had a difference of opinion when it came to reclaiming their technology, how to use it, dragons, etc. Interestingly the two most violent seeming Twelve are father and daughter, Rhalgr and Halone, while the others have mostly common titles (the Lover, the Traders, etc.). I'm thinking Rhalgr, Halone, and Byregot (being a builder rather than warrior) were fairly high up in society before it's fall, perhaps even holding resentment towards Dragons following the Meracydia conquest. That could explain the current situation in Ishgard. What's more, if Midgardsormr was protecting the most important relic of Allag to prevent it ever being misused again, perhaps his sons were doing the same; Nidhogg was ousted from his domain by Ishgardians at the City-States founding, their sin could very well be them taking back dangerous Allagan technology Nidhogg was safeguarding. That maybe-shield and suspiciously Allagan like blue line seen on the bridge to Ishgard in the trailer certainly indicate something...

Only issue with all this, and why I think it's potentially silly, is where dos Hydaelyn fit into all this? Midgardsormr actively acknowledges Hydaelyn and seems far more related to Her than to the Twelve. Some of the stuff really fits nicely though, like Midgardsormr opposing Garlemald because they attempted to recreate Crystal Tower at Bozja Citadel and then made a move for Crystal Towers resting place...