This archive tracks four layers. A record present in 2 of them (HH, M41) is silent in the rest, and says so.
The Horus HeresyM30–M31
imperium
Host of the Council of Nikaea
Chosen for a trial, not for itself: the Emperor convened the whole Imperium's argument about psykers here and ruled against the Librarius. Magnus broke that ruling within the year.
Age of the ImperiumM32–M40
[RECORD LOST]
No record for this location in Age of the Imperium.
The 41st Millenniumpre-Rift
unknown
[RECORD LOST]
[RECORD LOST]
nothing is published about what became of Nikaea after the Council that made its name.
Era Indomituspost-Rift
[RECORD LOST]
No record for this location in Era Indomitus.
Position
Map frame: 300, 560 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 209 units ≈ 22.2k light years, west of the galactic core.
Height above the disk plane: -6.4 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Nikaea System
Books set here
2 titles in the reading tracker touch this record. Titles link out to the tracker.
[RECORD LOST] — the infobox Class field is empty. Rendered temperate as a neutral default for a world whose only published role is hosting a conclave
gposlow
derived: Segmentum Solar, and a venue every Legion could reach quickly implies a well-connected position near Terra. Placed east of Terra inside the Solar boundary