The Coregency Stela is the name given to seven limestone stela-fragments which were found in a tomb at Amarna

Amarna

Amarna is an extensive Egyptian archaeological site that represents the remains of the capital city newly–established and built by the Pharaoh Akhenaten of the late Eighteenth Dynasty , and abandoned shortly afterwards...

. The stela dates from the late Eighteenth dynasty of Egypt

Eighteenth dynasty of Egypt

The eighteenth dynasty of ancient Egypt is perhaps the best known of all the dynasties of ancient Egypt...

 and shows the figures of Akhenaten

Akhenaten

Akhenaten also spelled Echnaton,Ikhnaton,and Khuenaten;meaning "living spirit of Aten") known before the fifth year of his reign as Amenhotep IV , was a Pharaoh of the Eighteenth dynasty of Egypt who ruled for 17 years and died perhaps in 1336 BC or 1334 BC...

, Nefertiti

Nefertiti

Nefertiti was the Great Royal Wife of the Egyptian Pharaoh Akhenaten. Nefertiti and her husband were known for a religious revolution, in which they started to worship one god only...

, and Meritaten

Meritaten

Meritaten also spelled Merytaten or Meryetaten was an ancient Egyptian queen of the eighteenth dynasty, who held the position of Great Royal Wife to Pharaoh Smenkhkare, who may have been a brother or son of Akhenaten...

. At some time after the stela was made, Nefertiti's name had been chiselled out and was replaced with Ankhkheperure Neferneferuaten, the name of Akhenaten's co-regent

Smenkhkare

Smenkhkare was an ephemeral Ancient Egyptian Pharaoh of the late Eighteenth Dynasty, of whom very little is known for certain...

. At the same time Meritaten's name was replaced with that of Ankhesenpaaten, Akhenaten and Nefertiti's third daughter.

The stela might shed light on the events of the little known late-Amarna Period

Amarna Period

The Amarna Period was an era of Egyptian history during the latter half of the Eighteenth Dynasty when the royal residence of the pharaoh and his queen was shifted to Akhetaten in what is now modern-day Amarna...

 and the question of Akhenaten's immediate succession. Restoration and interpretation of the stela vary, but it has been suggested that it supports the claim that Nefertiti should be identified as Akhenaten co-regent and successor.

The stela is currently in the Petrie Museum, in London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

.