A large space station that serves as the combined home of the Federation government and Starfleet Command in the 32nd century, concealed behind a distortion field after the Burn.
Federation Headquarters is introduced in the Discovery episode Die Trying, set in 3189. With the Federation shrunk to a few dozen worlds after the Burn, its government and Starfleet's surviving fleet shelter together inside a distortion field at secret coordinates.
Fleet Admiral Charles Vance commands Starfleet from the station, and Discovery is refitted there. In There Is a Tide the Emerald Chain leader Osyraa uses the captured Discovery to breach the field and then offers an armistice.
In the fourth season President Laira Rillak governs from the station, which proves able to travel and is moved to Earth to help evacuate the planet from the Dark Matter Anomaly in Coming Home.