Schemes of the Lich King
Imperial School of Wizardry
The School of Imperial Wizardry in Horizon is one of the only few sanctioned mage colleges in the realm. Magic, while necessary, is looked upon with mistrust by many for what can be done with it. Certainly, there are other mage colleges that exist but most are shunned by the empire and many are outright persecuted for their dangerous experiments and their lack of regard for morality and ethics.
The School is overseen by the Archmage, even if not on a day-to-day basis (as that is left to his council). But as all magic is seen as the responsibility of the Archmage, the empire looks to him to shepherd this dangerous and powerful force to the right hands and keep it from falling into the wrong ones.
Admittance to the School is strict, only allowing those with strong promise and from solid, well respected families. Certainly other circumstances could allow individuals though without strong family connections but this is rare. More often than not, individuals seek out mages to work with as an apprentice or find darker, less regulated schools from which to learn the arts.