You and Anton slowly opened that grand golden door; revealing the full near blinding majesty of a palace within. Every corner of this place being decorated in the finest gold.

The Gilded Palace is a realm within the Maw, and is home to the Queen of Glittering. She Who Rests In Splendor. Or more commonly Archdemoness of Greed. Her greed doesn't extend her extensive amount of titles but her colossal gilded palace.

For those new, here is the start of the Dungeon of Change series: Darkwood

Generally recommended to start there to understand the lore a bit more and the character Anton Goebel.