This archive tracks four layers. A record present in 4 of them (HH, AoI, M41, IND) is silent in the rest, and says so.
The Horus HeresyM30–M31
imperium
Homeworld of Perturabo and the IV Legion; put down by its own Legion
A world of rival mountain city-states that Perturabo learned siegecraft on. When it revolted during the Great Crusade he took the Iron Warriors home and reduced it, and never forgave himself or anyone else for it.
Age of the ImperiumM32–M40
none
Dead world
Left as the Legion left it, which was thoroughly.
The 41st Millenniumpre-Rift
none
Dead world
[RECORD LOST]
no published account has anyone reclaiming Olympia.
Era Indomituspost-Rift
none
Dead world
Nothing has come back to it. Perturabo has Medrengard, which he built himself out of the Eye, and this one is left where he left it.
Position
Map frame: 640, 318 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 230 units ≈ 24.4k light years, north-east of the galactic core.
Height above the disk plane: 2.0 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Olympia Majoris System
Books set here
3 titles in the reading tracker touch this record, 1 of them as a primary location. Titles link out to the tracker.
wh40k.lexicanum.com/wiki/Olympia §History — 'Olympia was originally a rugged, mountainous world whose population was concentrated within many city states... The planet had vast amount of stone available and as such large fortresses were built, and controlling the paths through the mountains and the high ground was very important to military security'. Rendered fortress on that passage: ridged stone and fortification is the world Perturabo learned siegecraft on. The infobox Class of 'Dead World, former Adeptus Astartes Homeworld' is its state after the aoi entry and is carried by the aoi and m41 statuses
gposlow
derived: Ultima Segmentum, placed in the segmentum's northern reach, inside the Astronomican's ~50,000 ly reach from Terra. No published bearing exists
era-indomitushigh
this entry exists to close a rendering gap, not because a new source appeared. app/src/stages/system.js draws a planet in every era whether or not its record carries that era, and derives a destroyed world's grey from eras[era].status — so an era key the record does not carry falls back to the survey class and the world comes back to life in it. With the baseline moved to this world's LIVING appearance, a missing indomitus key would have done exactly that. The status carries forward what the preceding era already states, on the same source; nothing new is claimed