Planet information
Sun orbited

White Sun[1]

Date terraformed





1.210x1022 tonnes[1]


1.0145 G[1]

Orbital position


Orbital distance

1,346,380,830km (9.000 AU)[1]

Orbital periods

27.00 years/9,862 days[1]


Central planets[2]

Cities and towns

New Cardiff, The House[2]




Union of Allied Planets[2]

"I'd like to be the King of all Londinium and wear a shiny hat."
Malcolm Reynolds[src]

Londinium, along with its sister planet Sihnon, was one of the first planets colonized after the exodus from Earth-That-Was. Being the most like Earth-That-Was, it was the easiest to settle on and thus an ideal choice.


Most of the settlers came from Europe and the Americas and the predominant western culture took hold here quickly. Old western traditions were combined with modern technology, the best example being the buildings themselves as they were built with the most advanced materials but designed to look like stone. The Imperial Gothic style of the buildings (e.g. the contemporary Houses of Parliament, Tower Bridge, etc.) became the norm for almost all building on Londinium. The symbol of the planet is an Imperial Gothic clocktower (a la Big Ben). The planet had twenty-six metropolises, five of which were prominent spaceports. The capital city of Londinium was New Cardiff.

Politics was the main activity on Londinium. The Alliance Parliament building was situated on Londinium. The Parliament building itself (which contains "the House", where the members of Parliament meet to debate current issues) was the size of a small city and surrounding Alliance government complex which contained the offices of ministers and their civil servants (and was also where the aforementioned clocktower was) made up the entire unitary decision-making body of the Allied Planets. There was a policy of shoot-on-sight for any craft that comes too close to the Parliament building No Fly Zone.

Not all of the planet was dedicated to political dealings though. Art was also a major attraction. Londinium contained the finest museums of Earth-That-Was and colonial artifacts and also the largest collections of Western-style art in the system. The Londinium Museum, which contained the Museum of History and the Museum of Art, was a splendid building that held a variety of treasures. Most came from the early days of colonization, but the most valuable pieces were the ancient artifacts from Earth-That-Was.

Such a large military target was protected by a large military presence. The Ministry of Intelligence and the elite SAS (Special Alliance Support) forces had their headquarters on the planet, while, in orbit the Alliance flagship Victoria protected the skies.


  • Londinium is the original Latin name for the settlement which became London.
  • In the CoDominium series Sparta is the colony world for the United States and Europe. St. Ekaterina is the colony world for Russia and Asia. Londinium is the colony for the United States and Europe. Sihnon is the colony world for Asia.


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