Imperial Palace - Outer Palace: Katabatic Plain - The Katabatic Plain was the wide and empty windswept plain of the Himalazians that surrounded the entire Imperial Palace complex and had originally been levelled by terraforming techniques during the construction of the Palace complex in the final years of the Unification Wars. Due to ancient laws prohibiting construction too close to the walls, the area around the Outer Palace walls are empty which is an extreme rarity on Terra in the 41st Millennium. Those that live close to the walls include the rich and the poor, those who live in relative splendour and those trapped in the worst squalor.Annapurna Gate - One of the enormous gates of the Outer Palace. Throughout the Age of the Imperium, millions of pilgrims have flocked to Terra simply to see its exquisite craftsmanship. The orbis and lazulite work encrusting this gate took Menzo of Travert 30 standard years to complete. It was said that its ornamentation surpassed even the Eternity Gate in pure aesthetic. During the fortification of the Imperial Palace's defences following the outbreak of the Horus Heresy in the early 31st Millennium, Rogal Dorn had the Annapurna Gate carefully dismantled with great care and stored within the Palace's vaults. He intended to have it rebuilt following an Imperial victory over the upstart Warmaster Horus and his cohorts of Traitors. It is unknown whether these stored elements of the gate survived the massive orbital bombardment during the Siege of Terra or whether they are still kept within the confines of some great sealed chamber within the bowels of the Imperial Palace.Colossi - Colossi was a bastion and gate guarding the northern approach to the Lion's Gate from the Lion's Gate Spaceport. It is one of several bastions which guards the approach to the Lion's Gate.Aurum Gard - One of several bastions which guards the approach to the Lion's Gate.Marmax - One of several bastions which guards the approach to the Lion's Gate.Aurum Bar - One of several bastions which guards the approach to the Lion's Gate.Lion's Gate - One of the enormous, fortified portals that was part of the Outer Palace but led into the Inner Palace just south of the Ultimate Gate and also protecting the Lion's Gate Spaceport, the Lion's Gate overlooked the fields of the Indian sub-continent's Brahmaputra Plateau. A portion of the space it enclosed also served as one of the two massive spaceports that serviced the needs of the Imperial Palace. It had once been a thing of magnificence, a massive gate topped with two gilded beasts rising up to lock claws in a feral dispute, a sculpture that had given the gate its name. During the fortification of the Imperial Palace in the early 31st Millennium after the outbreak of the Horus Heresy, the Praetorian of Terra Rogal Dorn had these two great beasts replaced with giant grey donjons stippled with casemates and Macro-gun ports. A curtain wall of bleak rockcrete encircled the gate, its edge fletched with Void Shield vanes like the spines of some prehistoric reptile. During the Siege of Terra, the Lion's Gate spaceport was the site of a massive battle between the White Scars and the overwhelming hordes of the Traitor Legions. The Primarch Jaghatai Khan spearheaded a daring night attack comprised of his White Scars, surviving remnants of the 1st Tank Division and elements of the surviving Imperial Army regiments against the surprised Traitors. Throwing a defensive perimeter around the spaceport, he held it against all counterattacks, halving the flow of Traitor Legionaries and materiel towards the Imperial Palace at a stroke. This key victory would later prove to be a pivotal moment in the Imperial defence of Terra.Lion's Gate Spaceport - Located near the Lion's Gate, which connects the Inner and Outer Palace complexes, the Lion's Gate Spaceport is the greatest surface-to-space transportation facility on the Throneworld. A massive structure, the Lion's Gate Spaceport extended into the upper atmosphere of Terra and contained an immense number of docking yards and space elevators capable of receiving even a Gloriana-class Battleship. The outer portion of each layer of the spaceport, up to about a kilometre deep, were called "the Skin"; this gave way to the mantlezone around the innermost ten kilometres, which itself was known as the "Core Wards," or just "the Core." During the Siege of Terra the Lion's Gate and its adjacent spaceport were the most heavily defended locations of the Imperial Palace. Its defences included over 18,000 Imperial Fists Astartes and 800,000 Imperial Army troops under the command of Fafnir Rann. Despite this, during the siege it fell to a combined assault led by Kroeger, Ezekyle Abaddon, Kharn, and the Primarch Perturabo. However, the spaceport was reclaimed by the White Scars and the 1st Terran Tank Division of the Imperial Army later in the siege during a daring raid led by Primarch Jaghatai Khan. The facility is still in use as the primary spaceport of the Imperial Palace in the 41st Millennium.Eternity Wall - The Eternity Wall was the name of the wall that surrounded the Outer Palace. The Eternity Wall was also the site of one of the two main spaceports utilised by the inhabitants of the Imperial Palace, the Eternity Wall Spaceport, located on its eastern side.Investiary - The Investiary was a massive amphitheatre open to the night sky, its broad space once containing the statues of the twenty Primarchs on ouslite plinths in a silent ring. The Investiary was two kilometres in diameter. Under the light of the glittering stars, it felt like an arena, where twenty warriors had gathered to face combat. During the time of the Great Crusade, the second and eleventh plinths had been vacant for a long time. No one ever spoke of these two absent brothers of the lost II and XI Space Marine Legions. First Captain Sigismund of the Imperial Fists Legion later urged his father Rogal Dorn to remove the effigies of the traitorous Primarchs who betrayed the Emperor from the Investiary. He had offered to do the work himself, which made the Emperor laugh. During that time, they were temporarily shrouded. Following the end of the Horus Heresy, the effigies of the Traitor Primarchs were removed as well.Inner Gardens - Within the confines of the Outer Palace were the legendary Inner Gardens. In this garden was erected very high walks, supported by stone pillars; the Inner gardens were a pensile paradise and were constantly replenished with all sorts of flora and fauna drawn from across Terra and the human-settled galaxy. The Inner Gardens sloped like a hillside and several parts of the structure rose from one another, tier upon tier, the appearance of the whole resembling that of a theatre. Unfortunately, during the Siege of Terra when the forces of the Warmaster Horus breached the walls of the Inner Palace, the battle raged across the grounds of the Inner Garden, turning the vast parkland into a charnel house. It is unknown whether or not this beautiful edifice was rebuilt following the end of the Horus Heresy.Hall of Leng - The Hall of Leng was a favourite place of the Emperor when He still walked amongst men. When He was not sequestered in secret toil in the deep, private crypts of the Palace on his Imperial Webway Project, he was known to spend a great deal of time in the Hall, measuring the angles of space and time. It was said that the past and future co-mingled at the site, and had done so since primordial times, before the place had owned the name Leng, before the Emperor had been born, before a roof had been raised above it, or human eyes had seen it. The Hall of Leng, long-beamed and dark, was simply a domestication of one of the Materium's myriad physical anomalies, filled with a tangible darkness that made many people feel uncomfortable within its confines. The immense Hall was starlight-dark and silent as midnight. It was decorated with columns, ancient statuary, and metallic assayers and binding apparatus set up by antiquarians of previous epochs that had never been removed.Hall of Victories - The Hall of Victories was a several hundred meter long hallway that was full of stasis glass cabinets varying in size from those small enough to fit in a human palm, to some the size of battle tanks, arranged in rows across the hall. The Hall of Victories did not contain objects such as weapons or armours, instead it contained objects from across the galaxy that were millennia old that symbolized humanity's achievements throughout history. The Hall of Victories was built several kilometers under the surface of the Imperial Palace and had to be reached by elevator. The entrance of the Hall of Victories was a massive set of double doors, each gilded and engraved, showing pictures of a man and woman facing each other. On the left door the woman held a babe in the crook of one arm and a sword in her hand, her hair flowing like a waterfall, mingling with the billowing dress that in turn merged with the long grass of her feet. On the right, the man, dressed in worker's overalls, chain with the crossed lightning bolt of Unification hanging around his neck, had a wrench in one hand and pistol in the other, looking to the skies. Between them burned a stylised star, surrounded by other pinpricks in the sky. Above the doors, ornate scrollwork held a caption written in an ancient Terran language that when translated stated, "People of Earth, Together." Once the doors were swung open, arched windows to the right let in sunlight that illuminated the hall. The stasis glass cabinets in the Hall of Victories held objects like the Navigational Circuit from the first warp-capable ship and a broken piece of human-made clay pottery that was broken into eight shards, marked with fingerprints and dents, that dated back tens of millennia. Most of the objects held in the Hall were technological or scientific in nature, but some were cultural in nature.City of Sight - The City of Sight was built within a section of the Emperor's own Imperial Palace in the Himalazian (Himalayan) Mountains. This was the main headquarters of the Adeptus Astra Telepathica during the Great Crusade and the opening days of the Horus Heresy. During those bygone days, the City of Sight appeared as if there was no trace that anyone lived in that forsaken part of the palace. Potential Sanctioned Psykers spent many years within its bleak towers, learning how to harness their abilities for the betterment of Mankind. Where other regions of the palace were celebrations of the Unity wrought by the extension of the Emperor's rule over all of Terra, the builders of the City of Sight seemed to have gone out of their way to craft something calculated to weigh on the soul. Beyond the domain of the astro-telepaths, the architecture of the palace was raised up in glorification of Mankind's achievements, its statuary fashioned to remind the grateful populace of Terra of all that had been rebuilt in the wake of the terrible, world-spanning wars that had almost dragged the human species down into extinction. But none of this could be found in the City of Sight. At the heart of the City of Sight lies the Conduit, the nexus of all intergalactic communication for the Imperium of Man. Originally carved out of the limestone by an army of servitors, these high-roof chambers are filled with black-clad infocytes plugged into their cogitators and arranged in hundreds of serried ranks. Once a telepathic message is received by these infocytes and interpreted and sifted by the cryptaesthesians and is passed on by the Conduit to the recipient via pneumo-tubes. The other portion of the City of Sight was comprised of the Obsidian Keep, the fortress-like headquarters edifice of the Adeptus Astra Telepathica.Sanctum of a Thousand Eyes - The Sanctum of a Thousand Eyes is the stronghold of the Adeptus Custodes specialist formation known as the Dread Host, which rises to dominate an entire district of the Imperial Palace. This armoured bastion is lit with electro-braziers and arc-lumen of immense size, all angled to under-light the five hundred enormous eagle statues that line the Sanctum's upper battlements. Each as large as a superheavy tank, these ominous sculptures are posed in vigilant stances, many staring up into the stellar gulf while the remainder peer down upon the thronging processionals below. Superstition runs rife that the eagles of the Sanctum of a Thousand Eyes can perceive disloyalty no matter where it lies, and that the Emperor looks through their avian eyes to see the darkness in men's hearts. To some extent this is true; each eagle contains a complex array of long-range augurs, servitor cogitation banks and multi-spectral listening devices that feed floods of information down into the Sanctum's data-shrines. This information is used by the Dread Host to isolate and annihilate threats to the Golden Throne.Avenue of Eternal Remembrance - The avenue is a 100 kilometer-long causeway built from the remains of Chaos Titans from the Siege of Terra. Built in honor of Sanguinius, it leads to the Eternity Gate itself.Dome of the ArchitectsEnlightener's StarFortress of the TribunateNexus AdministrataSprawl Magnifican - The Sprawl Magnifican is the great hive-city-like urban sprawl which makes up much of the Outer Palace in the 41st Millennium.Victoris AbsoluteVigilatum Orbital BatteryCrystal ObservatoryForge of Flesh and SteelThe PreceptoryThe Long RoomCentral Offices of the Departmento Munitorum