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PL Truth SeekerHQ.png They call me many things: Murderer. Cutthroat. Thief. But you may call me Isidore Mercator.

This article is about a subject that lacks an official name and is known only by its nickname, title, or alias.

Isidore Mercator, also called Isidorus[1] and I.M.,[2] was the pseudonym of the mysterious and brilliant scholar who led the Bellatores Dei, a secret group of religious zealots.[3]

Around the time of the siege of Paris, Mercator ordered the excavation of ruins at Champlieu, Gisacum, and Diodurum. The Hidden One Abbo Cernuus eliminated the men sent to those places in an effort to keep the Lutetia bureau safe.[4] Isidore had his spies track down the unknown assailant and assigned a captain to seek him out at the Abbey of Saint-Germain-des-Prés, though he, too, was eliminated.[2]

During the same period, Isidore tasked Bishop Engelwin with aligning the will of King Charles the Fat with that of the Bellatores Dei, though Engelwin did not manage to do so thanks to the influence Queen Richardis had over her husband. He wrote a letter to inform Isidorus of this and of his future plans, but it remained unsent in his quarters.[1]

Isidore also forged a number of false papal decretals that would "hoodwink Christendom for a thousand years", as historian Shaun Hastings put in 2020.[3]



  1. 1.0 1.1 Assassin's Creed: ValhallaThe Siege of ParisMajesty in the Dark
  2. 2.0 2.1 Assassin's Creed: Valhalla – The Siege of ParisThe Ghost of Saint Germain
  3. 3.0 3.1 Assassin's Creed: Valhalla – The Siege of ParisDatabase: Bellatores Dei
  4. Assassin's Creed: Valhalla – The Siege of ParisHidden