Tazenda
Tazenda is an oligarchy of 27 planets which stayed out of interstellar politics. It was considered by The Mule to be the home of the Second Foundation because of its location 120 radial degrees from Terminus, its location in a constellation visible from Trantor (giving it the name "Star's End"), and its name sounding similar to "Star's End." It was attacked and destroyed by the Mule in 315 F.E. It was not, in fact, the location of the Second Foundation.
Read more about this topic: List Of Foundation Universe Planets