Even the scholarly wizards of the Aurantian Concordat are ultimately unsure of who or what it was that created the Tower. One thing is clear, however: it is unbelievably ancient.
It seems to have been used and occupied by a variety of different intelligent beings over millennia. Some conjecture it is older than the universes to which it connects.
Despite the variety of random occurrences that cause otherwise identical universes to greatly diverge in similarity, and despite the chaos introduced by the existence of magic, there is a great deal of uniformity throughout the multiverse.
Most who have studied the Tower and its Many Worlds attribute this to the Tower itself rather than random coincidence.
This is a short handbook and guide to the Tower that should be of assistance to those both intrepid and foolish enough to find themselves stuck inside the enigmatic edifice.