Guardian Palace
A solemn temple on Iliad's top layer: a quiet sanctuary few approach, the world's information hub, and the place where the Twelve meet at regular intervals.
A multi-layered Digital World run by the host computer Homeros, where Greek and Roman mythology runs deep in the data. Twelve guardian gods watch over its areas in pairs, while the ruler of the dead keeps the lowest layer apart from them.
temples, cities, seas and forges stacked above an underworld
Iliad is a Digital World managed by the host computer Homeros, and it has evolved in its own way, unlike other Digital Worlds; official material infers that data from Greek and Roman mythology is deeply involved. It is a multi-layered world of independent areas with very different environments, separated by a void and linked by rails. In ancient times it was a single huge continent, until the continent collapsed and split into pieces.
Homeros usually keeps silent and rarely takes part in running the world: it is programmed to act when Iliad faces a crisis that threatens its survival. It has no fixed form, and the guardians revere it through the symbol of a lyre.
regional responsibilities within the Olympos XII: each pair guards one area
A solemn temple on Iliad's top layer: a quiet sanctuary few approach, the world's information hub, and the place where the Twelve meet at regular intervals.
Iliad's relay point: cluttered streets full of every kind of Digimon. Merukimon is often off wandering and Minervamon skips work to play, yet it is the most peaceful place in Iliad.
A vast ocean, the largest area. Its beaches and coral reefs stay calm under Venusmon, the deep sea is dangerous, and Neptunemon's castle, the Abyss Sanctuary, stands at the bottom.
Rows of factories home to Machine and Cyborg Digimon, with veins of DigiZoid ore. Lax management lets black markets and arenas thrive, yet its defenses and the volcano where Marsmon is stationed make it impregnable.
Covered in giant trees and rich in nature, home to Plant and Insect Digimon. Ceresmon merges with the forest to hide its huge form, and Bacchusmon loves the fruit data gathered there.
Scorching heat and freezing cold, two sides of one area where only the physically strongest survive. A legend says a giant white Digimon will emerge from it to stop the world's collapse.
main guardian organization: twelve gods under Homeros
Twelve guardians gathered under Homeros, with Jupitermon at their head, protect Iliad pair by pair (see the regions above). Marsmon's profile credits them with abilities rivaling the Royal Knights while staying neutral in the incidents of the Digital World. In ancient times they defeated the Titans. Plutomon acts apart from them and has a longstanding feud with Jupitermon.
historical faction: the people of Erebus
The collective name for the Digimon who lived in Erebus, a dark city that developed its own civilization inside Iliad's Dark Area. Membership was not a matter of species: outsiders could join if the Titans accepted them. In ancient Iliad they invaded the other areas and fought a fierce war against the Twelve; they were defeated and nearly annihilated, and why they invaded is still unknown. Plutomon keeps their souls in Erebus, now a ruin full of vengeful spirits.
Open the Titans page →Iliad's lowest layer, where the souls of the dead end up

Established Lore
The Dark Area is the underworld where the souls of dead Digimon go, the lowest region of multi-layered Iliad. Plutomon reigns there as ruler, acting separately from the Twelve: it is not a member of the Olympos XII.
The realm returns properly functioning DigiCores to the upper areas as Digi-Eggs and imprisons DigiCores that carry serious bugs, so death and rebirth both pass through it. Plutomon breaks that cycle for one people: it keeps the souls of the defeated Titans in Erebus instead of returning them.
Plutomon shares Jupitermon's goal of punishing evil, but the two have a longstanding animosity, because Jupitermon does not approve of Plutomon's cruelty. Compare it with the other underworld authorities on Dark Areas & Cocytus.
line-ups set in Iliad, not organizations
"One who crosses the heavens." A virtual pet version set in Iliad, released in Olympos Green. Its Olympos XII are Apollomon, Jupitermon, Vulcanusmon, Bacchusmon, Neptunemon and Merukimon.
"Guardian of the astral realm." Its companion version in Iliad Blue, with Marsmon, Venusmon, Dianamon, Ceresmon, Junomon and Minervamon, plus Plutomon. Apollomon and Dianamon Jogress across the two into GraceNovamon.
Both names are official, but they belong to two virtual pets that split the Twelve between them. They have no leaders or mission inside the story, so the atlas treats them as thematic line-ups of Iliad's Digimon.
who answers to whom, and how firmly each link is established
Names link to DigimonWiki/Fandom (CC BY-SA unless noted otherwise); artwork © Bandai, shown from the official Digimon Reference Book. The atlas is an editorial model built from official material, not a universal chain of command. Area names and descriptions follow the official Iliad page; the mythology lines are editorial notes on the Roman gods behind each guardian.