Babel

Babel was the code-name for an inhabited neutral planet. This planet was used by United Earth, and later the United Federation of Planets, as a venue for conferences, which were mediated in council chambers. 

Location
Babel was located in the same sector as. Relative to Tellar Prime, Babel was located on the far side of Andorian space. 

In 2293, the location of Babel in the Milky Way Galaxy was labeled in the star chart The Explored Galaxy, which was on display in James T. Kirk's quarters aboard the USS Enterprise (NCC-1701-A). (, okudagram)

In 2367, the location of Babel was labeled on a tactical situation monitor in Benjamin Maxwell's ready room on the USS Phoenix. (, okudagram)

In 2366, in an alternate timeline, during the, the location of Babel was labeled on a tactical situation monitor in the ready room aboard the USS Enterprise (NCC-1701-D). (, okudagram)

History
The planet was planned to host negotiations to settle trade disputes between the Andorians and the Tellarites and mediated by Starfleet on behalf of United Earth in 2154. However, the meeting was postponed due to tensions between the two powers caused by a raiding Romulan scout vessel in the area. 

In 2268, on stardate 3850.3, the Babel Conference considered 's admission to the Federation. Two things came of this conference: the Babel Resolutions and Coridan's admission to the Federation. 

In 2270, the USS Enterprise (NCC-1701) transported Commodore Robert April and his wife Sarah to Babel, where ambassadors from all Federation worlds had converged to honor April as he had reached his mandatory retirement age.