Shelves fill room 9/16, and boxes fill those shelves, each precisely labeled in Giant. Barrels line the east wall, carefully positioned and as tall as a human. Despite the appearance of bounty, most of the containers are empty. Lanterns light the room, powered by an unfamiliar source.
It took a few days, but I think I puzzled out a floor layout that fits the room diagram I created. It's a bit more boxy than I'd like, but I think I can start moving away from that on the next floor. Right now, that large central stairwell dictates a lot of how the floors look.