I believe the Library served as a place of power for the Beholding in its time. I have Statements in my world of horrific creatures found in the area that were described as having only a single, staring eye.

Given the capabilities you've displayed thus far, I would surmise that eye you have would be a cursed object associated with the Beholding in my world. Your eye, something that would be linked to the Beholding came from Egypt. Alexandria was a place of power for it. Hence...

[He lifts a hand before picking up his tea to sip.]