The axis mundi (also cosmic axis, world axis, world pillar, center of the world, world tree), in certain beliefs and philosophies, is the world center, or the connection between Heaven and Earth. As the celestial pole and geographic pole, it expresses a point of connection between sky and earth where the four compass directions meet. At this point travel and correspondence is made between higher and lower realms
(my bold)
https://en.m.wikipedia.org/wiki/Axis_mundi
And the god of that world will stretch forth his hand against the Son, and they will crucify Him on a tree, and will slay Him not knowing who He is.
(Ascension of Isaiah 13:14)