Empyrean House

From Star Trek: Gamma One

Empyrean House, or the Silver Tower as it is casually known, is home to the President of the United Federation of Planets. The main building is 30 stories, with the office of the President, named the Red Room, located on the 30th floor. Typically the President's quarters and those of his family are also on the 30th floor, but may be located in higher in the tower portion. The tower portion is a smaller portion of the building which rises to a towering 100 stories in height. Empyrean House is located in Paris, on Earth.

As Empyrean House is the center of much activity for the Federation and even for Starfleet, a great many officers are present in the building working. Many cadets or junior officers who have distinguished themselves serve as aides, junior members of security and so on in the headquarters.