Titan (Moon) - Notable Locations: Apex Cronus Bastion - This mighty space station, which is the size of a small moon, orbits Titan and is considered one of the most formidable star fortresses in the Imperium. It is rumoured to surpass even the Imperial Fists Chapter's mighty warship Phalanx in firepower.Archivum Titanis - This is where the battlefield reports of the actions conducted by the Grey Knights all across the galaxy are stored within the shelves of the Archivum.Augurium - The silver pinnacle that contains the mirrored chamber known as the Augurium lies at the top of the fortress-monastery's tallest tower. Within its mirrored walls, the Grey Knights' Prognosticar go about their rituals and meditations. In function, the Prognosticators are responsible for tracking the unholy spoor of daemons through the roiling tides of the Immaterium to wherever they emerge or are summoned into Imperial space. Such is the secretive nature of the Grey Knights' duty and so duplicitous are the foes they face that they cannot rely upon other servants of the Emperor to guide them to their prey. In most cases, by the time a Planetary Governor sends out a panicked astropathic cry for aid and the presence of daemonic forces is both detected and verified, it will be too late. Instead, the Grey Knights rely upon their Prognosticars to alert them to daemonic incursion, often solar months or standard years before these events occur, allowing them to appear before aid is called for and close the tears in reality before they can widen and flood realspace with Warp energy –- the lifeblood of the Daemon. Prognosticars are Grey Knights especially gifted in reading the ebb and flow of the Warp. Ensconced in the Silver Pinnacle, the central tower of the Citadel of Titan, this handful of Battle-Brothers spend their lives untangling the strands of fate and looking into the future of the Chapter. The mirrored chamber of the Prognosticars, known as the Augurium, reflects the thoughts of the Grey Knights back upon themselves. Each Battle-Brother must then sift through images from the past, present and future, looking for meaning, and the writhing black coils of daemonic entropy that reveal where the veil between worlds will be torn and daemonic forces gather.Broadsword Station - The sky above Titan glitters in the dark with dozens of orbital defence platforms, warships and void-fortresses. Among these vast, drifting structures can be found Broadsword Station, berth of the Grey Knights Chapter fleet, and launching point for the Chapter's forays into the wider galaxy. Hanging in synchronous orbit above the fortress-monastery, the station's huge Macrobatteries and torpedo arrays form the Grey Knights' first line of defence against attack. The guns of the station can even be angled to point down onto Titan should the unthinkable ever happen and the citadel fall, or, worse yet, its daemonic prisoners escape their sorcerous containment. At any one time, there are dozens of Strike Cruisers gathered around Broadsword Station, undergoing repairs or preparations for missions. The Grey Knights' alliance with the Adeptus Mechanicus, as well as their favoured position alongside the Inquisition, ensures that their vessels are among the finest the Imperium can create, and few other voidships match them for speed. The station also acts as a training facility for those Chapter Serfs and specialist Servitors destined to act as crew on the Grey Knights' ancient starships. Unlike the lumbering battleships of the Imperial Navy, with their corridors and bilges packed with press-ganged ratings, the vessels of the Grey Knights boast expert crewmen. The Grey Knights are also blessed with patronage of their own Navigator House of the Navis Nobilite. By millennia-old accords these Navigators guide the Chapter's voidships through the Warp, often enshrined on a vessel from birth to death to keep the secrets of where they have gone and what horrors they have seen.Chamber of Purity - A deep chamber that lies amongst the roots of Mount Anarch, this is the oldest part of the citadel of the Grey Knights. It is here that the Purifiers, the noblest of the Grey Knights, are quartered, and few outsiders are permitted within. The Purifiers are those Grey Knights whose very being is anathema to Daemons, their psychic presence not just unpalatable to creatures of the Warp, but actively harmful. No more than a few dozen in number, the Purifiers maintain the Chambers of Purity, keeping its daemonic relics and restless spirits from stirring to life. It is here that the most twisted trophies of the Grey Knights are locked away, those profane objects too dangerous to study or hang in the Hall of Champions. Books, blades and bones held immobile in gilded stasis caskets fill niches all around the chamber, the ancient technology and the powerful psychic will of the Purifiers keeping the daemonic artefacts dormant. The Iron Grimoire, a sacred tome penned by Malcador the Sigillite and kept safe by the Supreme Grand Master, tells of another reason for the existence of the Chambers of Purity. It hints at a great evil imprisoned under the citadel, something buried there by the Emperor during the unification of the Sol System; something that could not be killed. For this reason the Chambers of Purity must always be guarded by at least one Purifier, lest this evil awaken from its millennia-long slumber.Terminus Decree - The Terminus Decree is a set of ancient instructions written upon millennia-old parchment and sealed within a mysterious artefact of the Grey Knights Chapter. This artefact goes unrecorded in all the libraries of the Imperium, for it has been kept secret from all but the Supreme Grand Masters of that Chapter. It is said that the Terminus Decree contains the final secret of the Chapter, a secret so great that it could destroy the foundations of the Imperium -- or provide salvation in its darkest hour. Deep within the Chambers of Purity, within the Grey Knights fortress-monastery on Titan, locked away in the chamber said to hold the tomb of Malcador the Sigillite himself, rests a simple wooden box, embellished with a golden seal. Within this box is the ancient parchment that contains the instructions known only as the Terminus Decree. Only a Supreme Grand Master of the Grey Knights knows how to open the box, and he will do so only when all hope for the future of humanity seems lost. The Terminus Decree is the ultimate sanction of the Grey Knights, a secret so vast it could bring the Imperium to its knees, or save it in its darkest hour. The exact nature of the document is unknown, and the only clue to its contents lies in the box's golden seal. It is whispered that it is the exact match of another seal, found only in one place in all the Imperium of Man's many scattered worlds: within the Imperial Palace, upon the Emperor's Golden Throne.Chamber of Trials - The Chamber of Trials is a forbidding keep set alongside the main bulk of the citadel where the Grey Knights train their Aspirants. It is from the Chamber of Trials that the Gatherers set out across the galaxy in search of new recruits for the Chapter. The Gatherers are Grey Knights whose great age or severe injuries no longer permit them to undertake the primary work of the Chapter, but whose keen senses and minds can still detect an Aspirant hero from amongst the common rabble of humanity. The Chamber of Trials is where Aspirants arrive and their training begins -- if they survive.Cloister of Sorrows - The Cloister of Sorrows was a place of contemplation -- open to Titan's sky, its atmosphere contained within invisible electromagnetic fields so that the great eye of the galaxy could look down upon the Grey Knights. The Emperor was a part of that gaze, always examining the soul of every one of His servants.Dead Fields - Beneath the Grey Knights' fortress proper lies a cool, damp crypt called the Dead Fields. It is here that every Grey Knight wishes to finally reside, in the hallowed halls of the glorious dead. When a Grey Knight falls in battle, and his body can be recovered, his brothers will carry him back to Titan. His body will then be carefully prepared for burial, his gene-seed removed and his flesh washed of the taint and filth of war. Specially blessed Servitors will then paint the 666 words of sanctity upon the body of the dead Space Marine, until he is covered in fine script from head to toe. He will then be encased in his burial armour, a suit of silvered plate mail, and his hands wrapped around a heavy steel sword inscribed with his deeds. His matchless arms and armour –- suit of Aegis Armour, Nemesis Force Weapon and Storm Bolter -- are taken back to the Chapter's armoury for future generations of Grey Knights, though they will always bear his name; tiny spidery scrawl coils around grips and barrels documenting hundreds of names almost invisible to the naked eye. So armed and armoured, the Grey Knight will be carried out to the Dead Fields, accompanied by a handful of his brothers and dozens of Chapter Serfs chanting prayers for his departed soul. The Dead Fields are a vast frozen tomb at the foot of Mount Anarch, beneath the large Temple of the Emperor, its chambers and alcoves carved from the cold, dead rock of Titan. The dead Grey Knight is sealed in this icy grave beside thousands of his fallen kin, where he will rest as long as the citadel stands. Often when a Grey Knight perishes his body will be lost to the Chapter, torn asunder by Daemons or incinerated in the baleful fires of the Warp. In these cases the Grey Knight's burial armour will be interred in his place, the empty silver suit grasping a blade bearing the Space Marine's name. As a final tribute to those members of the Chapter that have given their lives in the defence of the Imperium, 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 horrific circumstances imaginable battling the Forces of Chaos. And like all other matters in regard to the Grey Knights, they will remain almost completely unknown to the rest of the Imperium because of the official policy of denying the existence of Chaos and its daemonic agents to the human-settled galaxy at large.Deimos - The war needs of the Grey Knights call for a constant supply of ammunition and ordnance. Long ago the Chapter made alliance with the Adeptus Mechanicus and as part of their bargain were gifted with the Forge World of Deimos, known as the Steel Forge. Formerly one of the moons of Mars, the planetoid was dragged across the system to hang in the sky above Titan, its mass mined and converted until it was more star fort than celestial body. The Tech-priests and Servitors of Deimos serve the Grey Knights alone, crafting everything from Bolters and bolt shells to Stormravens and Land Raiders. Only the Nemesis Force Weaponry is created in the citadel by the Grey Knights themselves; all other materiel for the Chapter is ferried down from Deimos in an endless stream of heavily guarded transports. Servitors oversee the packing and transportation of everything destined for Titan, loading consignments in utmost secrecy to ensure that no one, not even the Tech-magi of Deimos, know the extent of the Grey Knights' arsenal. The same Servitors are then mind-wiped before their return to Deimos, lest the enemies of the Imperium were ever to dissect their shrivelled brains.Fallen Dagger Hall - The Fallen Dagger Hall is a chamber that serves as a place for close combat training for the Chapter's Neophytes, conducting drills and sometimes as an informal meeting place with Inquisitorial representatives of the Ordo Malleus. This chamber was so-named because Grand Master Kolgano, centuries earlier, challenged the Grey Knights under his command to an unarmoured dagger duel and promised his jewel-encrusted suit of Terminator Armour to anyone who could beat him. Kolgano is long gone, buried unbeaten with his dagger deep in the heart of Titan's catacombs, but the hall remained lofty and echoing.Hall of Champions - The huge central chamber of the citadel is known as the Hall of Champions, a place where the Grey Knights gather to celebrate their victories and hang their trophies where the entire Chapter can gaze upon them. Statues of ancient heroes and glorious Grand Masters look down upon all who enter the hall, their silent, stone stares speaking of great heroism and impressive victories. Ten thousand years of triumphs and trials against Daemonkind are recorded on the walls of the chamber, spelled out in torn, bloody banners, rune-encrusted skulls and the fragments of shattered swords. Each statue, artefact and icon represents a terrible campaign or Imperial Crusade, often still stained with the gore of those creatures that were banished and those that died in the banishing. Paladins, the Chapter's greatest warriors, frequent the Hall of Champions more than any other members of the Grey Knights. These great and glorious warriors gather here to honour their ancestors and their peers, relating deeds past and present in solemn rituals dedicated to the Emperor. It is considered right and just that the new generation of heroes should stand to account under the stony gaze of the old. During these ceremonies Battle-Brothers will speak to the statues of the champions, offering up oaths and binding vows to prove themselves worthy. On rare occasions these acts of devotion seem to elicit a response; the chamber darkens and torches gutter as if caught in a sudden wind, and the shadows playing across the faces of the statues bring the carvings to life. What a Battle-Brother sees in those cold stone faces is for him alone to know. The Hall of Champions is not just a place to honour heroes past, but also heroes present. When the Grey Knights defeat a great foe or mark an important event in their history this is where they will congregate. Over the centuries the hall has echoed countless times to the sounds of Grey Knight Battle-Brothers reflecting on their victories. After cleansing the daemonic Forge World of Cebrum II and slaying its Daemon Magi, the Grey Knights gathered in the hall, hanging the thirteen twisted iron masks of the Magi on the wall to mark their triumph. When the Grey Knights sealed the void well on Capulos, ending the 1,001 solar days of night, they brought back a fragment of the jade capstone used to close the breach as a symbol of their victory. Perhaps one of the greatest trophies of the Hall of Champions is the skull of Iremn'ath. The Daemon Rajah of Nalu, Iremn'ath was one of the few creatures to penetrate the outer circles of the Ibb worldmaze. Fear of the Daemon reaching the sacred Heart of Ibb prompted the Grey Knights into a long and costly battle to vanquish the Daemon. For a solar year an entire Brotherhood (company) of the Chapter hunted Iremn'ath's minions through the labyrinthine streets of Ibb, vanquishing his lieutenants and casting down the cults raised in his name. When at last the Grey Knights defeated the Daemon Prince, they bound his spirit to his skull. Since that day Iremn'ath has hung on the wall of the Hall of Champions, bound with wards and glyphs as scores of acolytes endlessly chant the spells that keep the Daemon imprisoned. From his vantage point upon the wall, Iremn'ath is forced to watch the triumphs of his foes and their victory rituals while he seethes with hatred and silently howls within a prison of bone and sorcery.Mandulian Chapel - This chapel consisted of a long gallery with a dizzyingly high ceiling, thick with columns and with statues in niches running along the walls. To reach the huge, three-panelled altar at the front of the chapel, a Grey Knight had to walk past the unwavering stone eyes of hundreds of Imperial heroes. Some of them were legends, some had been forgotten, and they represented every part of the web of different civilian and military organisations that kept the galaxy-spanning Imperium of Man together. Closest to the altar was the statue of Grand Master Mandulis himself, who had died a thousand standard years before the late 41st Millennium -- his figure carved into one of the pillars as if he were holding up the chapel's ceiling -- a clear symbolic message that Mandulis, like every Grey Knight, kept the Imperium from collapsing.Sanctum Sanctorum - Deep in the heart of the citadel lies the Sanctum Sanctorum. Behind triple-sealed portals, bound with forgotten science and Warp-magicks, the Sanctum keeps safe the Grey Knights' many psychic secrets. The towering shelves of time-worn tomes, crumbling scrolls and fragmented data crystals are tended to by the Chapter's Librarians; each of these honoured Battle-Brothers oversees a different section of the Sanctum, and specialises in a different part of the Grey Knights' history or lore. Assisting the Librarians are queues of shuffling hunchbacked Servitors -- their lobotomised brains wiped and reprogrammed at the end and start of each day. The Sanctum contains every secret of the Warp known to the Grey Knights, a galaxy of forbidden knowledge painstakingly gathered over thousands of standard years. Not even the data vaults of the Scholastica Psykana on Holy Terra can rival the archives held in the Sanctum. They contain the carefully guarded knowledge of how to fashion Nemesis Force Weapons -- an ancient technology said to have been created by the Emperor Himself specifically for the Grey Knights, and a secret the Chapter has kept safe since the time of the Horus Heresy. It is even rumoured that the Grey Knights have other writings of the Emperor, tomes that still bear words written in His hand, detailing what Humanity has learnt of the Warp and what was lost during the Dark Age of Technology.Librarium Daemonica - Perhaps the most important chamber within the Sanctum Sanctorum is the Librarium Daemonica. The room contains the names of every Daemon encountered by the Grey Knights and everything the Chapter knows about the Dark Gods and their agents. For this knowledge ever to leave Titan would be a disaster of unimaginable proportions. If the enemies of the Grey Knights were even to learn of the room's existence, it could spell doom for the Chapter. To protect such a valuable place, the room lies in the very centre of the Sanctum, encased with adamantium walls, floor and ceiling metres thick and bound with esoteric wards and layers of Void Shielding. A single passage leads into the chamber, its length barred by three doors. The first is a hulking blast door heavy enough to resist a continual barrage of Melta fire, and sealed with a cipher-lock with almost infinite combinations. The second portal is a spatial displacement field, an artefact of ancient science that bends space back upon itself. A foe trying to breach the field will find his weapons turned back upon him, and no matter how fast he runs he will end up where he started. The final door is a magickal vortex, proof against Daemons and psykers both. A being even weakly connected to the Warp that tries to cross the vortex without speaking the right words of power will have their soul ripped away. Before each of these doors a Grey Knight Librarian kneels in meditative silence, resting his arms upon the pommel of his blade until someone draws near, at which point he will rise to his feet, ready to strike. A trespasser has but a moment to speak the secret words that will send the Librarian back to his vigil, or his life is forfeit. The Guardian Librarians are specially chosen for their single-minded dedication and know not to trust the appearance of any that come before them, whether or not they wear the guise of a Grey Knight or even the face of a dear brother.Vault of Labyrinths - In one corner of the Sanctum Sanctorum lies a stasis vault, a time-sealed prison from which there can be no escape. Within the vault lie scores upon scores of Tesseract Labyrinths, fist-sized cubes of an alien design recovered from what are now recognised as unawakened Necron Tomb Worlds across the galaxy that are capable of imprisoning beings of pure energy, amongst whose ranks Daemons can be counted. Over the millennia, the Grey Knights have succeeded in sealing a few dozen Daemons within the extradimensional chambers of the Chapter's Tesseract Labyrinths, thus weakening the daemonic threat by a miniscule degree.Warp Nexus - The Warp Nexus is a star-shaped chamber that lies at the heart of the Grey Knights' fortress-monastery. The very air within throbs with shackled power. Fuelled by the ceaseless chants and prayers of two hundred Chapter serfs, it was the mandalas and pentagramic sigils of the Warp Nexus that maintained Titan and the Chapter fortress amongst the turbulent tides of the Immaterium during their time of preparation after the Horus Heresy. In the ten millennia since, much effort has gone into maintaining the Warp Nexus. In part, this is simply because it is one of the few tangible artefacts left behind by Malcador the Sigillite. This is underpinned by the more practical goal of attempting to realign the Warp Nexus' power once again, ensuring Titan has an unassailable refuge in the Empyrean should it be required.