Terra

Terra is the homeworld of human race. It was where the first human empires appeared and it is the most holy and revered place in the galaxy. It is home to many important segments of the Imperium, and even the earth that is tread is considered holy. It is effectively a temple the size of a planet. The planet is heavily polluted, many of the oceans have dissappeared and cities sprawl across most of the surface.

Holy Terra is the heart of the Imperium, containing so many of the important offices of power, that if it were to disappear, the entire Imperium would collapse in a matter of months. Also, it contains the mostly dead remains of the Emperor of Mankind.