houses and princes
The institution responsible for controlling all magic and training all magic users. They set the laws in regard to the use of arcane magic. The Arcane university was one of the first places established when people arrived in the new world. Since its creation it has been ruled by a non-magic-wielding noble, usually a duke or lord who relies on advice from a council of Arch mages(who are normally all at least marquesses themselves).
If you are a wizard there is a 99% chance that this is where you learned magic. If you are a sorcerer, there is a 90% chance you were trained here.