Genesis Ultima
Genesis Ultima, Latin for "Ultimate Beginning," is the name given to the hypothetical beginning of not just reality and eternity, but of all realities and eternities.
The question of whether there was an "ultimate beginning" is considered a Verum Ex Logica problem with Doctrina Ultra suggesting such a beginning is logically unlikely given that if there were one, you should rationally expect there to have been more than one.
No Beginning?
The universe in which we reside is rationally understood to have come into existence somehow. Most likely, some fundamental interplay at the core of reality is the true wellspring from which universes emerge.
See Also
➤ Infinite Journey:
➤ Wikipedia: Cosmogony