Citadel Council 500 BCE - 2186 CE
The Citadel Council at its greatest territorial extent in 807 CE, post-Krogan Rebellions. Just five years later, Outer Council space would become the Terminus Systems, and quarian and Council space would be cut off from each other by the Attican Traverse.
Political information
Type of government:	Intergovernmental organization
Founding document:	Asari-Salarian Pact
Head of State:	Varied numbers of species representatives
Societal information
Capital:	Citadel
Official language:	Numerous galactic languages
Currency:	Credit
Holidays:	Rachni Victory Day Rebellions Victory Day
Historical information
Formed from:	Asari Republics Salarian Union
Dates:	20 February 500 BCE - 20 September 2186 CE (2685 years, 7 months and 1 day)
Preceded by:	Prothean Empire
Succeeded by:	New Council

A timelapse of the Citadel Council's expansion, from the date of its formation to its final territorial status prior to dissolution.

"The galaxy's guiding hand. The enforcers of peace. That is the mantle we uphold most sacredly."

— Councilor Valern Onoke.

The United Citadel Council of Species, also known as the Council of Races, Citadel Council or simply the Council, and historically as the Old Council or Old Citadel Council, was an intergovernmental organization that represented the combined power of multiple species that covers the lower reaches of the galaxy. The Citadel Council was the galaxy's first (and at the time, only) united front of species. Both economically, militarily and socially significant, the Citadel Council was a major intergalactic superpower prior to the Reaper War. 

As a result of the Fall of the Citadel towards the end of the Reaper War, the Citadel Council was wiped out, and its role briefly assumed by the UGC. Following the end of the war, it was succeeded by the New Council, which was the same in purpose but with every member of the UGC allowed a seat. However, many of the Old Council's values, including its insignia and peacekeeping ideology, continued to live on in the New Council.