 The single instance of a reserve head found in an undisturbed tomb was located beside the sarcophagus of the tomb's occupant.It is generally assumed that all reserve heads were originally in similar positions in their respective tombs, though the large number of heads found in burial pits has led to the suggestion that they were instead originally displayed by the entrance of the tomb chamber rather than within the tomb.The timespan in which reserve heads were created was short; they were likely created by only a couple of generations of sculptors during the reigns of the pharaohs Khufu, Djedefre and Khafre.