Titan (Moon)

The Fortress-Monastery of the Grey Knights is based on Saturn's largest moon, Titan, and is carved entirely of basalt. Within the fortress hang pennants, banners and flags commemorating the victories and sacrifices made by the chapter in their war against the daemonic, but none other than the Grey Knights would recognise the names of these campaigns. The chapter operates in oppressive secrecy, beyond the knowledge of the Adeptus Terra and even the High Lords - as a part of the Ordo Malleus, the Grey Knights are answerable only to the Ordo and the Emperor. Even the location of the fortress-monastery is known only to the Ordo Malleus. Titan itself is surrounded by the rings of Saturn and multiple confidential Malleus-controlled moons: Mimas, the prison and execution centre of the Ordo Malleus, Enceladus, home of the leaders of the Ordo Malleus and other influential Malleus Inquisitors, and several others worlds.

Beneath the fortress lies a cool, damp crypt. It is here that every Grey Knight wishes to finally reside, in the hallowed halls of the glorious dead. Almost every member of the chapter will have their body recovered and brought to this crypt beneath the Emperor's Temple. As a final tribute to those that have given their lives, the names of the dead are carved ceremoniously into a great basalt wall in the heart of the fortress. Among these names are some of the Imperium's greatest heroes who died in the most heroic circumstances imaginable. And like all other matters in regard to Grey Knights, they will remain almost completely unknown.

The fortress-monastery also contains the Librarium Daemonica, the Imperium's foremost repository of warp lore and daemonology. The Librarium is a forbidding place, filled with the tens of thousands of the ancient tomes of diabolic lore the Ordo Malleus has accumulated over the millennia.