In Comics
Showcase #4 - Mystery of the Human Thunderbolt / The Man Who Broke the Time Barrier
Giant-Size X-Men #1 - Deadly Genesis
Base
Not Available
(current) Professor Charles Xaviers Institute for Higher Learning, Salem Center, Westchester County, New York (former) Muir Isle, Scotland,; a loft in Soho, Manhattan, Ust-Ordynski Collective, Lake Baikal, Siberia, U.S.S.R., X-Men Headquarters in Austra