The princess winks at them.
They are led around the school, from the ground floor, to the classrooms, work rooms, library, and the instructors' private workshops. As per the excuse for having her there, Scyelen is prompted for tidbits about how various things are relevant to student life, and she does her best to stammer out something informative for the princess.
Prominent on the tour is the Vault.
The Vault takes up an entire floor of the tower, between the second terrace and the third. The door is a massive thing of oak and steel, set into a solid wall of stone. Osmond brags about the two-of-a-kind (the other belonging to the Church of the Founder) Structural Enforcement Field, a state-of-the-art persistent enchantment that makes the walls of the Vault unbreakable. While priceless relics of religious significance are kept in the church's sister-Vault, this Vault contains relics of academic and military importance.
The tour ends back at the dining hall, where a special meal has been prepared for the royal delegation now that the students have cleared out.