Like the other temples of the Officio Assassinorum, the Vanus Temple was originally the Vanus Clade, created some time during the Great Crusade in the late 30th Millennium at the behest of Malcador the Sigillite, the Regent of Terra, who was secretly the Grand Master of Assassins, and the clade's first Director Primus, who was known only as Sire Vanus. The Vanus Clade was established in a secret location on Terra at the direction of the Grand Master of Assassins and was tasked, like all of the Assassin clades, with killing those who opposed the formation of the Imperium of Man and the will of the Emperor of Mankind. The Vanus Clade was known for being able to remove the enemies of the Imperium through the manipulation of data rather than outright termination through the use of lethal force