Ananke Alpha is a spherical, maximum security, top secret Federation prison complex. It was constructed in the 2320s as a facility to hold extremely dangerous criminals and those who were difficult to detain. The complex was located in an extremely remote star system with no planets. Following the Dominion War, the Female Changeling was imprisoned at Ananke Alpha. (DS9 novella: The Dominion: Olympus Descending, ST website: The Path to 2409)