This archive tracks four layers. A record present in 1 of them (M41) is silent in the rest, and says so.
The Horus HeresyM30–M31
[RECORD LOST]
No record for this location in The Horus Heresy.
Position: not recorded — this record has no real-space position in any era.
Age of the ImperiumM32–M40
[RECORD LOST]
No record for this location in Age of the Imperium.
Position: not recorded — this record has no real-space position in any era.
The 41st Millenniumpre-Rift
chaos
Thousand Sons Battle Barge, Ahriman's flagship
The flagship of Ahriman and his Prodigal Sons in the late 41st millennium. The exiles raised it in the Eye of Terror from the wreck of an Imperial vessel lost in the warp and rebuilt it with iron and steel made from cold stars; only an aquila figurehead still shows what it was, and the rest of it is Thousand Sons towers, domes and pyramids (Ahriman: Eternal, Ahriman: Undying).
Position: not recorded — this record has no real-space position in any era.
Era Indomituspost-Rift
[RECORD LOST]
No record for this location in Era Indomitus.
Position: not recorded — this record has no real-space position in any era.
Position
This record has no real-space position and is not placed on the map. The reason is in the provenance below.
Books set here
1 title in the reading tracker touches this record. Titles link out to the tracker.
Every fact in this record, and where it came from. Editorial derivations say so.
identityhigh
wh40k.lexicanum.com/wiki/Hekaton_(Warship ) (read directly in a browser on 2026-10-03): 'a Thousand Sons Battle Barge which acts as the flagship of Azhek Ahriman and his Prodigal Sons in M41' (Ahriman: Undying ch. 1); 'Built in the Eye of Terror in the period since the Horus Heresy ... by raising the wreck of an Imperial vessel lost in the Warp and modifying it with iron and steel converted from cold stars. Only an Aquila figurehead on its structure remains' (Ahriman: Eternal ch. 4). https://wh40k.lexicanum.com/wiki/Known_Vessels_of_the_Thousand_Sons: 'Hekaton, Flagship, Post-Heresy, Flagship of Azhek Ahriman in M41' (Ahriman: Undying chs. 1-2). NAME-COLLISION CHECK: the Lexicanum title is disambiguated '(Warship)'; this record is the Thousand Sons Battle Barge only. No index record uses the id or label.
offMaphigh
No permitted source gives a position: it was built inside the Eye of Terror, and the page names no system it sails to. Admitted, not placed.
archetypemedium
'battleship' as for Titan Child: a Battle Barge is the Astartes capital ship (Lexicanum Hekaton_(Warship), List_of_Battle_Barges).
erashigh
m41 only, the era Lexicanum gives ('in M41'). Allegiance 'chaos' (Thousand Sons). The attack on it in Ahriman: Undying (Lexicanum Ctesias, chs. 16-17) is a spoiler and is kept off the record.