Tower

A robust structure with inbuilt Enchantments. A Tower can vary in size, function and power. In most cities, the Tower functions as a way-station, a bastion, and a nerve-centre for all magical matter. Even the most basic Tower include the ability to amplify the manifestation of Spellcraft of its stationed Mages, the levitation of its structural body, long-distance teleportation and displacement, and the ability to act as a mass-communication Divination array. A tier 1 city's Ley-lines usually provide power to the Tower. For Frontier cities with limited geodynamic supplies of mana, a significant cargo of HDMs are required.

Commonwealth
Towers belonging to the old British Mageocracy, said to have conquered more than 50% of all Human lands in its Golden Age. The Commonwealth form a loose factional coalition through a shared ideology of social democracy, English as a primary language, and mutual defence-pacts.

Independent
Towers not beholden to any specific faction and are wholly independent (on paper). Singapore, Istanbul, Tel Aviv, and Hong Kong are examples.

State Owned
Towers which are a part of the global network of Towers but are beholden to their city-states or nations. Almost all non-independent Towers belong to this category.