doesn't matter - only deities and deity-like creatures are able to enter here so they can interact with each other in concepts.
it's a big mansion with a lot of empty rich rooms; every single of them having the reason to exist, even though Time God himself doesn't know what are the reasons. the most important rooms has to be the Garden where the door to the world of dead is located and the Library where Archivist keeps the notes about every world existed.
it can change the appearance as much as the owner wants but Hyungwon kept it a mansion as it was; when Ten visits it, it changes to a some temple-looking place with a lot of neon lights and tropical plants. Стрелец once has won a bet against Time God and demanded an ownership for 24 hours (even though she lied to him and kept it for a month) and reformed it to be a kind of school in bright colors.