Creator
David Michelinie, John Byrne
Chris Claremont, Paul Smith
Base
Avengers Compound, Los Angeles; formerly Infinite Avengers Mansion; Captive aboard a Skrull ship; Avengers Mansion, New York City, New York
The Xavier Institute, Salem Center, Westchester County, New York State, (former) The Alley (beneath Manhattans surface), X-Factor Is sentient starship