The Event is what various collectors and interested persons refer to the moment in time that Room 10 became The Lost Room. No one, not even the Occupant, knows exactly what happened. Joe Miller said that the room "was ripped from from the reality of this world".

The Event occurred at 1:20:44 p.m. on May 4, 1961. Whatever it was it erased the room and everything in it from history.

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