The Cyclorama Building at Gettysburg was a historic modernist concrete and glass Mission 66 building dedicated November 19, 1962 by the National Park Service (NPS) to serve as a Gettysburg Battlefield visitor center, to exhibit the 1883 Paul Philippoteaux Battle of Gettysburg cyclorama and other artifacts, and to provide an observation deck. The building was demolished in 2013.

Mission 66 was a United States National Park Service ten-year program that was intended to dramatically expand Park Service visitor services by 1966, in time for the 50th anniversary of the establishment of the Park Service.