The Utraean Catacombs are a dungeon located beneath the Utraean Circle in Hiroth; they are the prison that held much of the Utraean Peninsula's Maljin until they were unwittingly released by the Utraean Society and the adventurers Marked with Fire. The local Maljin and their leading Assassin were finally taken care of when the Tenstone was placed on a special altar within the catacombs' Inner Sanctum.
They share similar architecture with the dungeons beneath Castle Ehb, the Pit of Despair, and Fortress Emarard.
The Trial of Gallus lorebook is found here.