outhouse
Atheistically
Thats described as the singularity. In the singularity there would be no space, would have been infintenmsly small. At that point time literally stops according to physics, it started off as eternity. In theory you can use a black hole to warp space because outside spacetime you come back to one single point no matter where you are in the universe. In theory anything having a high enough mass time can stop. As you approach a black hole you would observe the universe speeding up around you.
Thanks for a limited view of what is known.
But I asked how that related to your OP.
A super massive black hole could have created the universe, in another universe.