According to Herodotus, she invited the murderers of her brother, the "king of Egypt", to a banquet, then killed them by flooding the sealed room with the Nile. Then, to avoid the other conspirators, she committed suicide. Manetho claims she built the "third pyramid" at Giza, which is attributed by modern historians and archaeologists to pharaoh Menkaure of the Fourth dynasty. Manetho was most likely confused by the similarity of the names Menkara and Menkaure.
Nitocris is not mentioned, however, in any native Egyptian inscriptions and she probably did not exist. It was long claimed that Nitocris appears on a fragment of the Turin King List, dated to the Nineteenth Dynasty, under the Egyptian name of Nitiqreti. The fragment where this name appears was thought to belong to the Sixth Dynasty portion of the king list, thus appearing to confirm both Herodotus and Manetho. However, microscopic analysis of the Turin King List suggests the fragment was misplaced in reassembling the fragmentary text, and that the name Nitiqreti is in fact a faulty transcription of the praenomen of a clearly male king Netjerkare Siptah I, who is named on the Abydos King List as the successor of the Sixth Dynasty king Nemtyemsaf II. On the Abydos King List, Netjerkare Siptah is placed in the equivalent spot that Neitiqreti Siptah holds on the Turin King List.
In fiction
Two letters in the name are transposed in Bolesław Prus' 1895 historical novelPharaoh, where "Nikotris" appears as the mother of the protagonist, Pharaoh "Ramses XIII".
The Queen's Enemies, a play by Lord Dunsany, is based upon Herodotus' account of Nitocris' murderous activities.
Nitocris is mentioned in two stories by H. P. Lovecraft, "The Outsider" and "Imprisoned with the Pharaohs". She is mentioned only in passing and portrayed as an evil queen reigning over ghouls and other horrors. In the short story "Under the Pyramids", is mentioned also under the name Nitokris.
Tennessee Williams' first published work is the 1928 short story "The Vengeance of Nitocris", detailing the queen's careful plan for revenge. She makes the people who slew her brother die in a fitting way.
Le Basalte Bleu, a book by John Knittel, has a sort of time-travel plot in which the main characterfalls in love with the ancient queen. Knittel speculates that the origin of the Cinderellafairy tale lies in the marriage of Nitocris, who lost her golden sandal only to have it later found by the pharaoh.
Nitocris appears in The Mummy and Miss Nitocris by George Griffith, where she is the namesake of an Egyptologist's daughter in whose person she is reincarnated.
Nitocris appears in Fate/Grand Order as a Caster-class and later an Assassin-class Servant with ties to Anubis and Medjed. As Servants are influenced by fictional interpretations of their legends, Nitocris' powers are mostly based on Lovecraft and Lumley's stories about her, and she wields the titular mirror from the latter as her weapon.