Heard of, yes. They're the ones that did construction around Kugane's Aetheryte, if the information from drunk locals I've talked to during my tavern visits were to be believed.

[ He tries to think if there's any more things he can recall about them, but ultimately shook his head. ]

But as for proper details, I'm afraid not. You might have better luck talking to my other comrades from my Shard or even other Warriors of Light, if they're present. My friends have been hanging around Doma lately to help with reconstruction and would've learned more about them than me, I'm afraid.

[ He was a bit busy with helping Genbu with his problem, as well as the whole Garlean being dicks thing, so his attention is completely occupied at the moment with no downtime. ]