21st century BC

Millennium:	3rd millennium BC
Centuries:	22nd century BC; 21st century BC; 20th century BC;
Timelines:	22nd century BC; 21st century BC; 20th century BC;
State leaders:	22nd century BC; 21st century BC; 20th century BC;
Decades:	2090s BC; 2080s BC; 2070s BC; 2060s BC; 2050s BC; 2040s BC; 2030s BC; 2020s BC; 2010s BC; 2000s BC;
Categories:	Births – Deaths ; Establishments – Disestablishments

The 21st century BC was a century which lasted from the year 2100 BC to 2001 BC.

Events

Ur-Nammu (seated) bestows governorship on Ḫašḫamer, patesi (high priest) of Iškun-Sin (cylinder seal impression, ca. 2100 BC).

Note: all dates from this long ago should be regarded as either approximate or conjectural; there are no absolutely certain dates, and multiple competing reconstructed chronologies, for this time period.

c. 2100 BC - Sintashta culture emerges; possible date when Proto-Indo-Iranian was spoken.
c. 2100 BC – c. 2050 BC: Nanna Ziggurat, Ur (modern Muqaiyir, Iraq) was built.
2091 BC: Beginning of the Patriarchal Age was traditionally set in this year.
2080 BC: Ninth Dynasty wars in Egypt.
2080 BC: First Intermediate Period of Egypt ended. Middle Kingdom began in Ancient Egypt.
2071 BC: Magh Ithe, first recorded battle in Ireland myths.
c. 2064 BC – 1986 BC: Twin Dynasty wars in Egypt.
c. 2055 BC: End of First Intermediate Period of Egypt. Start of Middle Kingdom. (another date is 2040 BC).
c. 2055 BC: Mentuhotep II from Thebes managed to reunite Ancient Egypt and began to rule (other date is 2040 BC).
c. 2055 BC – 1985 BC: Funerary Stele of Amenemhat I was made. Eleventh Dynasty of Egypt. Excavated in 1915–1916. It is now kept in Egyptian Museum, Cairo. The Metropolitan Museum of Art, New York.
c. 2050 BC: Eruption of Mt. Mariveles in the Philippines.
c. 2049 BC: Oak trees for Seahenge felled.
2034 BC – 2004 BC: Ur–Amorite wars
2025 BC: The Old Assyrian Empire is established. Assur becomes the capital of the kingdom and remains so for almost 270 years.
c. 2009 BC – 1997 BC: Funerary temple of Mentuhotep III was built. Eleventh Dynasty.
2004 BC: Elamite destruction of Ur. Third Dynasty of Ur.
c. 2000 BC: Aegean Bronze Age ended.

Significant people

Although many human societies were literate in this period, some individual persons mentioned in this article ought to be considered legendary rather than historical.

Mentuhotep II
Ur-Nammu, 3rd dynasty of Ur
Shulgi of Urim

Legendary people

According to Abrahamic religious tradition, this was the era of the Patriarch Abraham (however, other datings include 19th century BC, and/or 17th century through 15th century BC)
The Three Sovereigns and Five Emperors are to said to have ruled China during this time

Inventions, discoveries, introductions

2100 BC—Earliest extant law code in Mesopotamia, the Code of Ur-Nammu

Sovereign states

See: List of sovereign states in the 21st century BC.

Decades and years

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