We don't 'make' catacombs we adapt what nature has placed in our hands and make it magestic. - Fauchel Glorstran, Master Mason, in the Third Tome of the Mason's of Glorstran.
In the deep there is no sun, no moon, no stars. So what do people look upon for hope? What fills them with wonder and awe. Perhaps the Pillar is what they see in the darkness - filling them with light.
Some temples are celebrated but some are hidden from the sun and forgotten. The forgotten temple was a place of hidden worship but now hides other mysteries.