Valley of the Kings 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. 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.
Minor tombs in the Valley of the Kings are larger, multiple chambered tombs. These minor tombs served various purposes, some were intended for burials of lesser royalty or for private burials, some contained animal burials and others apparently never received a primary burial. In many cases these tombs also served secondary functions and later intrusive material has been found related to these secondary activities. While some of these tombs have been open since antiquity, the majority were discovered in the 19th and early 20th centuries during the height of exploration in the valley. Tombs in the Valley of the Kings are assigned a numerical "KV" (for Kings' Valley)