Magic Tower

The Magic Tower (魔塔) is a scholarly institute founded by the Trinity Wisemen and exists independently from any sovereign state. It's said to be one of the greatest holy lands for Mages, acting as a place where magic knowledge from both the east and west flows freely. It's protected by a complex barrier that makes the tower unable to be seen or entered except on the night of a new moon.

Background
The Tower was founded by the Trinity Wisemen after the three parted ways with Luminous Valentine. They created the tower as an archive to store as much of the world's magical knowledge and research as possible, with powerful mages and mage-hopefuls quickly flocking to it and forming the Kingdom of Malukshure in the tower's proximity.

After the events of How to Spend a Certain Vacation, the Tower opened its door to ordinary scholars in addition to mages, becoming something of an educational institute that welcomed anybody who showed promise.