The X-Mansion is the common name for Professor Xavier's mansion. It is the base of operations and training site of the X-Men and the location of a school for mutant teenagers, Xavier's School for Gifted Youngsters. It is also the worldwide headquarters of the X-Corporation. Its address is 1407 Graymalkin Lane, Salem Center (part of the town of North Salem), located in the very northeast corner of Westchester County. The school's motto is "mutatis mutandis."
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