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Map Basic Data Planetary Image
Small cross.pngSanctum
Name: Sanctum Unknown.jpg
Segmentum: Segmentum Solar[1] or Segmentum Pacificus[3][5][Conflicting sources]
Sector: Unknown
Subsector: Bastior Sub-sector[4]
System: Formidyre System[2]
Population: Unknown
Affiliation: Imperium
Class: Adeptus Astartes Homeworld[1], Anchor World[4]
Tithe Grade: Unknown

Sanctum is the homeworld of the White Templars Space Marine Chapter.[1]


A place of towering mountains, verdant plains, and techno-barbarian tribes, Sanctum is the homeworld of the White Templars. During the Fourth Tyrannic War, the Chapter acceded to it becoming one of the key Anchor Worlds of the Imperium to meet the Tyranid threat. As a result, vast swathes of the planets unspoiled wilderness were transformed into city-sized fortresses, spaceports, and supply depots. This did not bother the White Templars, who only regretted that they largely could not man these fortifications themselves as most of their strength was away on the Indomitus Crusade deep inside Imperium Nihilus.[4]

In the subsequent Battle of Bastior, Sanctum itself faced a massive Tyranid invasion from Grendyllus that was only blunted thanks to the efforts of Trajann Valoris. However, Tyranids still plague the world.[6]

Notable Locations

  • Holdfast - Fortress-Monastery of the White Templars[6]

Conflicting sources