The Citadel

The Citadel is a militaristic magical fortress and training academy for wizards, strategically placed in the middle of the Irulian Desert. It serves and defends the populace of the Imperium.

Description
Viewed from a distance, the Citadel resembles a glass tower over a mile high. Close up, the central tower known as the Erien is just the tallest; the base of the Erien is surrounded by "jagged crystal structures" crafted by magic, which sit at angles to the ground.

Floating amongst these crystalline structures are several massive platforms. These platforms house the populace, ornate buildings, gardens, and other structures of the city intended for the wizards' use. Residents range from young wizard students to elderly archmages, with some working as adventuring wizards and some as simple servants. The platforms can be raised and lowered; for example, there is a vast glass gate sitting on the ground, and any given platform may lower down to use it.

Rooms and buildings include lecture halls, cafes, large hangers for arcane machinery, and glass towers. To protect some buildings and inhabitants from the harsh weather, massive water domes are conjured from lakes to provide cooling. Illusions of greenery and wildlife appear across campus as well, as they cannot sustain naturally in the climate.

One platform in particular houses the Citadel's elite leadership. It typically rests a half mile above the ground, and is a quarter mile in size.

The Citadel's colors (as used in uniforms) are blue and white.

The Erien
The Erien is the largest, most prominent tower of the Citadel. A glass gate at the base permits entry onto its platforms. Due to the glass construction of the Erien, it is "really goddamn bright" inside, though significantly less so than outside.

Halls of teleportation
There are multiple halls of teleportation throughout the Citadel. Each hall contains a runic teleportation circle, manned by a teleportation specialist donning dark blue robes. Across the ceiling is a moving visual of a night sky that changes to the respective constellations of the teleportee’s destination.