KV55 is a tomb in the Valley of the Kings in Egypt. It was discovered by Edward R. Ayrton in 1907 while he was working in the Valley for Theodore M. Davis. It has long been speculated, as well as much-disputed, that the body found in this tomb was that of the famous 'heretic king' Akhenaten. The results of genetic and other scientific tests published in February 2010 have confirmed that the person buried there was both the son of Amenhotep III (as well as the father of Tutankhamun), and also that his age at the time of his death was in fact consistent with that of Akhenaten's; it is therefore almost certain that it is indeed Akhenaten's body.
Both the tomb's history and the identification of its single occupant have been problematic. It is assumed to be a royal cache and reburial dating from the late 18th Dynasty, prepared after the abandonment of Amarna and the dismantling of the royal necropolis there. The mummy found in the tomb has been identified by DNA testing as the biological father of Tutankhamun, confirmed through inscriptional evidence to be Akhenaten. On the basis of the recovered artefacts, it is also suggested that the burial once contained more than a single occupant, either interred on one occasion or over a period of time. Queen Tiye is most often named in this context.
It is also clear that the tomb was re-entered at a later time, almost certainly during the 20th Dynasty. At this time, any additional, hypothetical occupants of the tomb would have been removed and (possibly) relocated to KV35, while the remaining mummy and some of the other artefacts were desecrated and abandoned.
The tomb is often referred to as the Amarna cache, given the mixed nature of its contents.