It would have made more sense if they'd left out Bruma as well. The Mages Guild Charter explains that the six schools of magic are taught at six of the cities:
Alteration in Cheydinhal,
Conjuration in Chorrol,
Destruction in Skingrad,
Illusion in Bravil,
Mysticism in Leyawiin,
Restoration in Anvil.
Alchemy isn't considered a "school of magic"; perhaps that's because there are alchemists' stores that don't seem to have any connection with the Guild, and it's already escaped their control. IIRC Acadian placed Alchemy in Kvatch for his story, as it's still something a mage needs to learn. Restoration and Conjuration are also implied to be lesser schools than the other four, but you still need recommendations from Anvil and Chorrol.
QUOTE
IV. Membership Requirements
The Guild of Mages only accepts candidates of keen intelligence and dominant will. Candidates must exhibit mastery in the great schools of magic: Destruction, Alteration, Illusion, and Mysticism. Candidates must also display practical knowledge of enchantments and alchemical processes.
That implies that Cheydinhal, Bravil, Leyawiin and Skingrad should have been all the recommendations needed, and that there would be a practical test at the University for enchanting and alchemy.
One is also left wondering if Necromancy once had a home in Bruma, before Traven banned it. Mannimarco did choose to set up shop nearby.
This post has been edited by ghastley: Jul 26 2013, 07:34 PM