most imposing tomb of this period is that of Amenhotep III, WV22, located in the West Valley. It was re-investigated in the 1990s by a team from Waseda University, Japan, but it is not open to the public. At the same time, powerful and influential nobles began to be buried with the royal family; the most famous of these tombs is the joint tomb of Yuya and Tjuyu, KV46. They were possibly the parents of Queen Tiy. Until the discovery of the tomb of Tutankhamun, this was the best-preserved of the tombs that had been discovered in the Valley. Amarna Period The return of royal burials to Thebes after the end of the Amarna Period marks a change to the layout of royal burials, with the intermediate 'jogged axis' gradually giving way to the 'straight axis' of later dynasties. In the Western Valley, there is a tomb commencement that is thought to have been started for Akhenaten, but it is no more than a gateway and a series of steps. The tomb of Ay, Tutankhamun's successor is close by. It is likely that this tomb was started for Tutankhamun (its decoration is of a similar style), but later usurped for Ay's burial. This would mean that KV62 may have been Ay's original tomb, which would explain the smaller size and unusual layout for a royal tomb. The other Amarna Period tombs are located in a smaller, central area in the centre of the East Valley, with a possible mummy cache (KV55) that may contain the burials of several Amarna Period royals – Tiy and Smenkhkare or Akhenaten. In close proximity is the burial of Tutankhamun, perhaps the most famous discovery of modern Western archaeology. It was discovered here by Howard Carter on 4 November 1922, with clearance and conservation work continuing until 1932. This was the first royal tomb to be discovered that was still largely intact, although tomb robbers had entered. And until the excavation of KV63 on 10 March 2005, it was considered the last major discovery in the valley. The opulence of his grave goods notwithstanding, Tutankhamun was a relatively minor king, and other burials probably had more numerous treasures. In the same central area as KV62 and KV63, is "KV64", a radar anomaly believed to be a tomb or chamber announced on 28 July 2006. It was not an official designation, and the actual existence of