The Venerators of Osiron were created at some point after the Second Founding. In 2455.757.M40 they were one of the twenty Chapters contacted by the Adeptus Ministorum envoy Balthazar van Heppel, who wanted to write a report on the Space Marines' religious beliefs for the Ecclesiarch.
The Venerators of Osiron primarily wear white Power Armour. This includes the Aquila or Imperialis on the chest guard, as well as the helm, shoulder plate trim, arms, legs and greaves. The power pack, shoulder plate inset, torso and groin are blue. The white squad specialty symbol -- Tactical, Devastator, Assault or Veteran -- is located on the right shoulder plate. A black Roman numeral is stenciled in the centre of the squad specialty symbol, indicating squad number. The iconography of the left knee guard indicates company number in accordance with the Codex Astartes.
The Venerators of Osiron's Chapter badge is a white double-headed battle-axe, with two white lightning bolts striking forth from both sides, centred on a field of blue.
- Adeptus Astartes: Successor Chapters (Limited Release Booklet)
- Codex: Space Marines (3rd Edition), pg. 41
- Chapter Approved 2001 - Second Book of the Astronomican, pg. 117