Al Plastino, John Byrne, Robert Bernstein
Chris Claremont, Paul Smith
Superman Vol 2 #1
(January, 1987)
The Uncanny X-Men #169 - Catacombs
Mobile, though he generally operates out of Metropolis
The Xavier Institute, Salem Center, Westchester County, New York State, (former) The Alley (beneath Manhattans surface), X-Factor Is sentient starship