Imperial Palace - Structure: The Imperial Palace complex is divided into two security perimeters which essentially function as separate urban regions, the Outer and Inner Palaces, both of which are marked by thousands of landing pads for small craft and monstrous defensive weapons systems.Many of these defences were designed and emplaced by the Primarch Rogal Dorn at the time of the Horus Heresy in the early 31st Millennium. The Imperial Palace still possesses the scars of the terrible conflict that raged around it during the Siege of Terra more than 10,000 standard years ago.The Imperial Palace is as heavily populated and just as active as any hive city of the Imperium. In fact, it probably has a higher density of population per square kilometre than most hive cities. Billions of adepts from all branches of the Adeptus Terra work in the Imperial Palace complex overseeing the affairs of Mankind.The levels and byways of the Palace can take a lifetime to learn, and only the Adeptus Custodes know them all. From the rails of high balconies are artificial ravines 500 storeys deep, filled with lights and teeming with people. Some of the great domes in the Precinct, especially the Hegemon, are so vast, they contain their own miniature weather systems. Microclimate clouds drift under painted vaults. Rain in the Hegemon is said to be a portent of good fortune.The Outer Palace has become a grim slum inhabited by millions of destitute people who have no employment beyond the few scraps they can squeeze from the tables of the more fortunate adepts. While the Adeptus Custodes is responsible for the overall security of the Imperial Palace and directly polices the affairs of the Inner Palace, security within the urban zone of the Outer Palace is normally provided by the Adeptus Arbites.The Arbitrators are particularly concerned with providing security outside the many Imperial governmental office buildings of the Outer Palace where thousands of people queue up every day to seek employment in the Adeptus Administratum, even if only as menial serfs. Such employment is better than the desperate fight for survival that confronts so many of the men and women who make their homes in the squalid back alleys of the Outer Palace.Arbites shock troops are always on hand to brutally suppress the inevitable queue riots that break out every day as the grim lines of the desperate poor jockey for position.The Imperial Palace is the very heart of the Administratum, whose countless bureaucratic adepts labour anonymously in its massive archives, some stretching many kilometres beneath the surface of Terra, to keep the galaxy-spanning empire of Mankind running smoothly in the name of the God-Emperor. Without these adepts, the administrative machinery of the Imperium would grind to a halt, all access to the records of the past and the lines of transmission for decisions about the future cut off from the million worlds of Humanity.The Inner Palace is also the seat of the Senatorum Imperialis, the twelve High Lords of Terra, who are charged with divining the Emperor's will and ruling the Imperium in His name, their decisions implemented by the adepts of the Administratum and all the other organs of Imperial government.These twelve men and women, often drawn from the highest nobility of the Human-ruled galaxy, are the single most powerful individuals in the Imperium.They ultimately concern themselves with the implementation of Humanity's grand strategy, guiding the deployment of the Emperor's armies and ensuring that His will is respected on the million planets of the Milky Way Galaxy that Mankind calls home.