Well…that Antefalken took escalators up and down in the Cathedral of the Notorious Dame and that there are cars driving around the Courts…at least I think the author guy mentioned the cars and motorcycles.
The Denubian’s are a high tech alien race, they has spaceships etc.
As for super high tech, well I did once see this demon who drove around in, believe or not, a Blue Police Box….now there was a guy who’d wiped out more than a few entire races in fits of genocidal rage….