Proxima

Proxima was the first system settled by Earth, sometime before the second millenium BGC. It was also the only system that ever openly rebelled against Sol. The other systems that broke away from Earth rule did so simply by virtue of being too far away to maintain effective lines of communication and supply, instead choosing to rely on their neighbors or themselves. Along with Sol, Proxima is one of the founding members of the United Empire of Sol and Proxima. One of the conditions for the establishment of the Empire was that the capital be located on Proxima. The Emperor (or Empress) has ruled from the Imperial Palace just outside Proxima City since its completion in GY 9. The Houses of Parliament are located on the opposite side of Proxima City, just outside the city boundaries. The symbolism is intentional.