Manishtushu (Man-ištušu) (, Ma-an-ish-tu-su; died 2255 BC) was the third king of the Akkadian Empire, reigning 15 years c. 2270 BC until his death c. 2255 BC. His name means "Who is with him?". He was the son of Sargon the Great, the founder of the Akkadian Empire, and he was succeeded by his son, Naram-Sin who also deified him posthumously. A cylinder seal, of unknown provenance, clearly from the reign of Naram-Sin or later, refers to the deified Manishtushu i.e. "(For) the divine Man-istusu: Taribu, the wife of Lugal-ezen, had (this seal) fashioned".
Biography
Manishtushu was the third king of the Akkadian Empire according to Old Babylonian tradition though listed as the 2nd, after Sargon, in the Ur III recension of the Sumerian King List.
thumb|Votive stone mace-head from Uruk, Iraq., the name of Manishtushu appears, c. 2270-2255 BC. Iraq Museum.
He became king c. 2270 BC after the death of his brother Rimush. Manishtushu, freed of the rebellions of his brother's reign, led campaigns to distant lands. According to a passage from one of his inscriptions, he led a fleet down the Persian Gulf where 32 kings allied to fight him. Manishtushu was victorious and consequently looted their cities and silver mines, along with other expeditions to kingdoms along the Persian Gulf. He also sailed a fleet up the Tigris River that eventually traded with 37 other nations, conquered the city of Anshan in Elam, and rebuilt the destroyed temple of Inanna in Nineveh c. 2260 BC. In Elam and Pashime, in the coastal area of Iran, Manishtushu had governors installed for the Akkadian Empire: Eshpum was in charge of Elam, while Ilshu-rabi was in charge of Pashime.
thumb|BM 91018 Macehead in the name of Manishtushu
An ellipsoidal axehead (copper or bronze) from the region of Elam (provenance is uncertain as it is in a private collection) reads "(For) Maništušu, king of Kiš, Māšum, the charioteer, his servant". This form of axehead is known from other examples and from Akkadian Empire iconography. A marble mace head found at Sippar (BM 91018) reads "Man-istusu, king of the world, dedicated (this mace) to the goddess Belat-Aia". An alabaster mace head found at Isin (IB 1878 - Iraqi Museum number unknown), in the shrine of Ninurta of the Gula temple, reads "Man-istusu, king of the world, dedicated (this mace) to the goddess Ninisina.". Some inscriptions of the underlings of Manishtushu are known. A votive statue found at Susa reads "Man-istusu, king of the world: Espum, his servant, dedicated (this statue) to the goddess Narunte." and a copper spear point found at Assur (VA 8300) read "Man-istusu, king of the world: Azuzu, his servant, dedicated (this spear) to the god Be'al-SI.SL".
thumb|Archaic votive statue with Eshpum's inscription in the back
Around 2255 BC, Manishtushu died, possibly assassinated by members of his own court, and was succeeded by his son Naram-Sin. This supposed manner of his death is based on an Old Babylonian period extispicy omen text which reads "if the heart is like the testicle(s) of a sheep, it is an omen of Manishtushu, whom his palace killed". He held the title "King of Kish" in some of his inscriptions.
The Manishtushu "standard inscription" is known from at least eight exemplars, statue fragments found at Nippur (CBS 19925), Sippar (BM 56630 and BM 56631), Susa (SB 51 and SB 15566), and Khafajah (KH II 162) as well as Old Babylonian tablet copies of Manishtushu inscriptions found at Nippur (CBS 13972 and NI 3200) and Ur (U 7725):
thumb|Manishtushu Lugal Kish
An inscribed door socket was found at an unexcavated mound on the Adaim river near where it meets the Tigris river, Khara'ib Ghdairife. It read "Manistusu, king of Kis, builder of the temple of the goddess Ninhursaga in HA.A KI. Whoever removes this tablet, may Ninhursaga and Samas uproot his seed and destroy his progeny." The monument mainly deals with the refurbishment of the Ebabbar temple in Sippar. It was assumed to be a legitimate Old Babylonian period copy of an Old Akkadian period monument. Later research showed that it was actually an Old Babylonian forgery. More recently, scholarship has dated the forging of the cruciform monument even later, to the Neo-Babylonian period. Several Late Babylonian copies of the cruciform monument have also been found.