The Ayra Katrin is an order of magic users, enchanters, scholars, and engineers of the Seven Star Nation. This building is their headquarters, sitting on the tail tip of the dragon-shaped capital city of Agwilcress. Being a library, it is mainly filled with bookshelves, reading rooms, and offices. It also has dormitories, dining, and bathing pools for the inhabitants. The engineering portion of the order has its own facilities just down the hill, so this is mainly used by the scholars and visited by the other professions for study purposes.

The building actually has two floors below the "ground level", and the landscaping in front of the facade is actually a roof. You can see rows of skylights in the sandy soil.