
The Lost City of Hebeth
Hebeth was an Argenta city located under the surface of Mars.
History[]
In the distant past Mars was settled by a clan of Argenta, the Bethians, who establish Hebeth.[1] The Bethians chose Mars as the dawn of the war with Hell as the site for the Trans-Dimensional Barrier, a colossal construct designed to halt demonic incursions. Once an interdimensional port facilitating off-world travel between the disparate Sentinel cities, the Trans-Dimensional Barrier was turned into defense mechanism powered by the Red Planet's Aetherium Crystals to generate a quantum disruption field, which severed Hell's ability to open portals into Argent D'Nur.[2]
Doom: The Dark Ages[]

Doom Eternal[]
At some point, Hebeth was lost in the war against Hell and was buried underneath Mars.[1]
In the present day, the Doom Slayer was instructed to find the trans-dimensional gate to Sentinel Prime in Hebeth in order to locate the the final Hell Priest, Deag Grav. Aware that finding Hebeth would take too long if he were to traverse Mars' subterrain depths, the Doom Slayer used the BFG-10000, located on the UAC's Phobos base, to shoot a hole into the Martian surface, thus exposing the smoldering ruins of Hebeth.