Well-preserved. In other words, in wasn't an abandoned or lost space; it was maintained. This was possibly the most important detail he'd heard regarding this place in days. Klavier watched carefully as Nigredo drew the large circle room they'd initially walked into and a hallway off to one side.

That was... an interesting looking basement. Depending on how large the circle room was, it could encompass the backyard, the cafeteria, and/or the sun room underground. He wasn't quite sure what was above this hall he was drawing. That was the direction of the Music Room, but if it was long, it would extend beyond that. He wanted to keep in mind what was where in relation to the main floor of the institute in case further doors were discovered.

Suits of armor and weapons (which he assumed were more decorative in nature, like lances and swords), was interesting, but it hardly warranted as anything worth hiding. Still, he would keep that detail in mind.

"Problematic? What was in the next room?" he asked, glancing at Nigredo momentarily but keeping his eyes focused mainly on the diagram.