Tutankhamun was buried in a tomb that was small relative to his status. His death may have occurred unexpectedly, before the completion of a grander royal tomb, so that his mummy was buried in a tomb intended for someone else. This would preserve the observance of the customary seventy days between death and burial.

King Tutankhamun's mummy still rests in his tomb in the Valley of the Kings. On November 4, 2007, 85 years after Carter's discovery, the 19-year-old pharaoh went on display in his underground tomb in Luxor, when the linen-wrapped mummy was removed from its golden sarcophagus to a climate-controlled glass box. The case was designed to prevent the heightened rate of decomposition caused by the humidity and warmth from tourists visiting the tomb.

Discovery of tomb.

Tutankhamun seems to have faded from public consciousness in Ancient Egypt within a short time after his death, and remained virtually unknown until the 1920s. His tomb was robbed at least twice in antiquity, but based on the items taken (including perishable oils and perfumes) and the evidence of restoration of the tomb after the intrusions, it seems clear that these robberies took place within several months at most of the initial burial.

Eventually the location of the tomb was lost because it had come to be buried by stone chips from subsequent tombs, either dumped there or washed there by floods. In the years that followed, some huts for workers were built over the tomb entrance, clearly not knowing what lay beneath.  

When at the end of the twentieth dynasty the Valley of the Kings burials were systematically dismantled, the burial of Tutankhamun was overlooked, presumably because knowledge of it had been lost and his name may have been forgotten.