The professor put down a wooden box about the size of a person's head on the platform and spoke.

"There are 23 magic towers that have applied to receive probationary trainees this time, which is more than the last time. Among these are the magic towers that are so famous that you would've probably heard of them at least once in your life. But at the same time, there are others so small that you’ll wonder if a place like that even exists.."

I wasn’t sure of the exact number of magic towers, but there were approximately 150 in the empire. The reason I didn’t have an exact number was that each year, some would disappear or some new ones appear, depending on their productivity or research results. Therefore, there were often cases where a magic tower would disappear within a year of being sanctioned. 

When magic towers disappeared, civil servants were reassigned to other magic towers and the magicians would just relocate to another since they were still valuable resources.Of the 23 towers that the professor mentioned, there were probably only two or three that anyone would have heard of, and the rest were likely small and medium-sized magic towers...