The Crystal Tower

A tower built using mathematical concepts as the material. The magical substance is found leaking from the ears of 4 years when they delve too far into potentiality. Turns out it can be molded into a material stronger than stone. As the years go by, occasionally pieces of the tower disappear as a wizard out in the world solves what they got stuck on in their school days. Given that much of math theory is still evolving, new advanced students are always able to provide enough quantum stone to keep the tower from toppling.

Inside, students and research scholars ponder math problems in a pocket dimension that allows them to engage in non-euclidean math without running into paradox. There are also living quarters for upper classmen Quandrix students, as well as a laundry room for the residents.