What was the earliest school of magic mentioned in modern Fantasy literature, determined by publishing date?
"Modern Fantasy" would be defined as 1880 and later, though I'm tempted to set the era as starting with The Hobbit.
It must be an actual school, meaning:
- There are several teachers, teaching different subjects to many pupils.
- There is more than one chronological "class" of students (I mean that some graduate while the others are still learning).
- The school must be described at least in some level of detail in the book (as opposed to a simple "He was a good magician, educated in Massachusetts Institute of Transfiguration" mention of existence).
The earliest one I can think of is Ursula Le Guin's Roke in the Earthsea books, but there surely were earlier ones. Middle Earth didn't have one to the best of my recollection.