Altdorf is the sprawling capital of the Empire of Man, the greatest realm of humankind in the Old World, a teeming fortress-city raised where the mighty rivers Reik and Talabec meet. Home to hundreds of thousands, it is a labyrinth of soaring cathedrals, crowded slums, gun-foundries, and guild-halls, all crammed within walls that have never once fallen to an enemy assault.
The city's roots reach back to the dawn of the Empire itself, for it was near these very riverbanks that the tribes were first united. That ancient legacy is enshrined in the tale of Sigmar and the founding of the Empire, and Altdorf remains the seat of both the Emperor's throne and the Grand Theogonist of the state church, binding crown and faith in a single capital.
Altdorf is also the beating heart of Imperial sorcery and science. The Colleges of Magic raise their eight arcane towers within its bounds, training the battle-wizards who serve the Empire's armies, while its engineers and gunsmiths forge the cannon, handguns, and war-machines that let mortal men stand against monsters, undead, and daemons alike. Down its river-docks and market squares throng merchants, pilgrims, and fortune-seekers from every province and beyond, so that a dozen dialects and half as many faiths jostle in its crowded streets, and fortunes are made and ruined within a single day.
For all its grandeur, the city is no clean place. Its underbelly seethes with corruption, plague, cultists, and the ever-gnawing menace of the ratmen beneath its streets, and its politics are a nest of scheming nobles and ambitious priests. Yet Altdorf endures as it always has, proud, filthy, indomitable, and utterly central to the survival of mankind in a hostile world.