Ancient Mesopotamia
The cradle of civilization — the world's first cities, writing, laws, and empires, every milestone sourced.
A timeline of ancient Mesopotamia, the 'land between the rivers' where urban civilization began. It runs from the rise of the first cities in Sumer and the invention of cuneiform writing, through Mesopotamian mathematics, religion, and astronomy, the empires of Akkad, Ur, and Babylon and the law codes of Ur-Nammu and Hammurabi, to the might of Assyria, the splendor of Neo-Babylonian Babylon, and the Persian conquest of 539 BCE. Every event is backed by content-verified sources from museums and scholarly references.
Events
- c. 5400–4000 BCEReputable sourceWell documented
Eridu and the First Cities
On the marshy plain of southern Mesopotamia, the earliest settlements grew during the Ubaid period. Eridu — regarded by the Sumerians as the first city, home of the god Enki — took shape around 5400 BCE, with a temple rebuilt on the same spot for thousands of years.
Why it matters: This was the beginning of settled urban life. Mesopotamia — Greek for 'the land between the rivers' (the Tigris and Euphrates) — would become the cradle of civilization.
Sources- World History Encyclopedia. Eridu · reference
- 4th millennium BCEReputable source · 2 sourcesWell documented
The Rise of Uruk and the First Cities
Uruk grew into the world's first true metropolis, home to tens of thousands of people, ringed by great walls and centred on monumental temple complexes such as the Eanna precinct of the goddess Inanna.
Why it matters: Uruk is widely regarded as the first city in history — the place where dense population, monumental architecture, organised religion and specialised labour first came together.
Sources- World History Encyclopedia. Uruk · reference
- World History Encyclopedia. Sumer · reference
Related timelines- Ancient Egypt → — The other great river-valley civilization of antiquity
- c. 3500 BCEReputable sourceWell documented
The Wheel and the Plow
Mesopotamia gave the world some of its most fundamental technologies. The wheel — first used for pottery and then for transport — appears here in the 4th millennium BCE, alongside the ox-drawn plow and the sailing boat.
Why it matters: These inventions transformed farming, trade and travel, and remain among the most important in human history.
Sources- World History Encyclopedia. The Wheel · reference
- c. 3200 BCEReputable sourceWell documented
The Invention of Cuneiform Writing
Sumerian scribes began pressing a reed stylus into wet clay to record grain, livestock and trade. These wedge-shaped marks — cuneiform, from the Latin for 'wedge' — grew from simple pictographs into a full writing system.
Why it matters: This is the first writing in human history. It made law, literature, science and record-keeping possible, and marks the boundary between prehistory and recorded history.
Sources- World History Encyclopedia. Cuneiform · reference
- from c. 3000 BCEReputable sourceWell documented
Counting in Base 60
Sumerian and later Babylonian mathematicians developed a sophisticated number system built on base 60 (sexagesimal), mastering fractions, algebra, geometry and the systematic observation of the heavens.
Why it matters: We still divide the hour into 60 minutes, the minute into 60 seconds and the circle into 360 degrees — a direct inheritance from Mesopotamian mathematics.
- from the 3rd millennium BCEReputable sourceWell documented
The Gods of Mesopotamia
The Mesopotamians worshipped hundreds of gods who, they believed, had created humans to serve them. Great deities such as Anu, Enlil, and Inanna-Ishtar each had their own temple-city, and towering ziggurats served as the gods' earthly homes.
Why it matters: Mesopotamian religion shaped the region's cities, kingship and literature for three thousand years, and influenced later faiths through stories such as a great flood.
Sources - Early Dynastic Period, c. 2900–2334 BCEReputable sourceWell documented
The Sumerian City-States and the King List
Southern Mesopotamia was divided among rival city-states — Ur, Uruk, Lagash, Kish and others — each ruled by a king and centred on its patron god's temple. The Sumerian King List records these dynasties, claiming kingship had 'descended from heaven'.
Why it matters: These competing city-states forged the institutions of kingship, law and warfare, and the King List is one of the earliest attempts to write down history itself.
Sources - c. 2600 BCEReputable source · 2 sourcesWell documented
The Royal Tombs of Ur
At Ur, archaeologist Leonard Woolley (1922–1934) uncovered sixteen 'royal' tombs, including that of Queen Puabi, filled with gold, silver, lapis lazuli and carnelian treasures — along with the bodies of dozens of sacrificed attendants.
Why it matters: The tombs reveal the wealth, craftsmanship and beliefs of early Sumer, and Puabi's own seal — naming only her, not a husband — suggests she was a queen who ruled in her own right.
Sources- Penn Museum. Queen Puabi's Headdress from the Royal Cemetery at Ur · reference
- World History Encyclopedia. Ur · reference
- c. 2334 BCEReputable source · 2 sourcesWell documented
Sargon of Akkad and the World's First Empire
Sargon of Akkad conquered the Sumerian city-states and united Mesopotamia under a single ruler, founding the Akkadian Empire and a new capital, Akkad. He is remembered as the first great empire-builder in history.
Why it matters: The Akkadian Empire was the world's first true empire, ruling diverse peoples under one administration and spreading the Akkadian language across the region.
Sources- World History Encyclopedia. Sargon of Akkad · reference
- World History Encyclopedia. Akkadian Empire · reference
- c. 2150 BCEReputable source · 2 sourcesDebated
The Fall of Akkad
After about 150 years, the Akkadian Empire collapsed. Invading Gutians from the Zagros Mountains, combined — many scholars argue — with a severe drought, brought down the world's first empire.
Why it matters: Its fall showed how fragile even a great empire could be, and the memory of Akkad's rise and ruin haunted Mesopotamian literature for centuries.
How we know: The exact causes are debated: the Gutian invasion is documented, while the role and severity of climate change (a prolonged drought) is supported by some evidence but still argued over.
Sources- World History Encyclopedia. Gutians · reference
- World History Encyclopedia. Akkadian Empire · reference
- c. 2144–2124 BCEReputable sourceWell documented
Gudea of Lagash
Amid the fragmentation after Akkad, Gudea ruled the city-state of Lagash in a period of peace and prosperity. He devoted himself to building temples, and left behind many finely carved diorite statues portraying himself in prayer.
Why it matters: Gudea's reign marked a Sumerian cultural revival, and his statues and inscriptions are among the finest artworks and richest texts to survive from ancient Sumer.
Sources- World History Encyclopedia. Gudea · reference
- c. 2112–2004 BCEReputable source · 3 sourcesWell documented
The Third Dynasty of Ur and the First Law Code
Ur-Nammu founded the Third Dynasty of Ur, reuniting Sumer and raising the Great Ziggurat of Ur. His reign produced the Code of Ur-Nammu — the oldest surviving written law code, predating Hammurabi's by three centuries.
Why it matters: The Code of Ur-Nammu is the earliest known set of written laws, already setting fixed penalties for crimes — the beginning of a legal tradition that shapes the world today.
Sources- World History Encyclopedia. Ur-Nammu · reference
- World History Encyclopedia. Code of Ur-Nammu · reference
- World History Encyclopedia. Ziggurat · reference
- written c. 2100–1200 BCEReputable source · 2 sourcesWell documented
The Epic of Gilgamesh
Sumerian poems about the hero-king Gilgamesh were gradually woven into a single epic. It follows Gilgamesh's quest for immortality and includes a great flood story strikingly similar to the later biblical account of Noah.
Why it matters: The Epic of Gilgamesh is the world's oldest surviving great work of literature — a meditation on friendship, loss and mortality written thousands of years ago.
Sources - c. 1754 BCEReputable source · 3 sourcesWell documented
Hammurabi's Code and the Glory of Babylon
Hammurabi of Babylon united most of Mesopotamia and issued a famous code of nearly 300 laws, inscribed on a tall stone stele and topped by an image of the king before the sun god Shamash. Its penalties followed the principle of 'an eye for an eye.'
Why it matters: The Code of Hammurabi is the most complete and influential law code of the ancient world, publicly displayed so that, in Hammurabi's words, the strong might not oppress the weak.
Sources- World History Encyclopedia. Hammurabi · reference
- World History Encyclopedia. Code of Hammurabi · reference
- Musée du Louvre. Law Code of Hammurabi · reference
- 1595 BCEReputable source · 2 sourcesWell documented
The Hittite Sack of Babylon
In 1595 BCE, the Hittite king Mursili I raided far south and sacked Babylon, carrying off its treasures and ending the dynasty Hammurabi had founded. The Hittites soon withdrew, leaving the city weakened.
Why it matters: The sack ended the Old Babylonian period and plunged Mesopotamia into a poorly documented 'dark age' before new powers rose.
Sources- World History Encyclopedia. The Hittites · reference
- World History Encyclopedia. Hammurabi · reference
- c. 1595–1155 BCEReputable sourceWell documented
The Kassite Dynasty of Babylon
Into the vacuum stepped the Kassites, a people of uncertain origin who seized Babylon and ruled it for over four centuries — the longest single dynasty in Babylonian history. They restored stability and preserved Babylonian culture.
Why it matters: The Kassites turned Babylon into a lasting seat of power and a respected member of the international 'club' of great Bronze Age kingdoms.
Sources- World History Encyclopedia. Kassites · reference
- from c. 1350 BCEReputable sourceWell documented
The Rise of Assyria
In the north, the city of Ashur grew into a powerful kingdom named for its chief god. Through the Middle and then Neo-Assyrian periods, Assyria built one of the ancient world's most formidable military states.
Why it matters: Assyria would become the largest empire the world had yet seen, dominating the Near East for centuries through a professional army and ruthless conquest.
Sources- World History Encyclopedia. Assyria · reference
- 883–859 BCEReputable sourceWell documented
Ashurnasirpal II and the Assyrian War Machine
Ashurnasirpal II expanded the Neo-Assyrian Empire through relentless, brutal campaigns and moved the capital to a magnificent new city at Kalhu (Nimrud), decorated with carved stone reliefs boasting of his conquests.
Why it matters: He set the template for the Neo-Assyrian Empire — a war state that used terror, deportation and grand propaganda art to control a vast territory.
Sources- World History Encyclopedia. Ashurnasirpal II · reference
- 745–727 BCEReputable sourceWell documented
Tiglath-Pileser III Rebuilds the Empire
Tiglath-Pileser III reformed the Assyrian state — creating a standing professional army, reorganising the provinces, and deporting conquered peoples on a massive scale to prevent rebellion.
Why it matters: His reforms turned Assyria into a true super-power and the largest empire the world had yet seen, a model of imperial administration later powers would copy.
Sources- World History Encyclopedia. Tiglath-Pileser III · reference
- 705–681 BCEReputable source · 2 sourcesWell documented
Sennacherib and the Zenith of Assyria
Sennacherib made Nineveh the greatest city in the world, building a 'Palace Without Rival' and an advanced system of canals and aqueducts. His campaigns included the famous siege of the fortress of Lachish, recorded in stone reliefs.
Why it matters: Under Sennacherib the Assyrian Empire reached its height, and Nineveh became a dazzling imperial capital on the Tigris.
Sources- World History Encyclopedia. Sennacherib · reference
- World History Encyclopedia. Nineveh · reference
- 668–627 BCEReputable sourceWell documented
The Library of Ashurbanipal
King Ashurbanipal gathered tens of thousands of clay tablets into a great library at Nineveh, collecting literature, science, omens and history — including the best-preserved copy of the Epic of Gilgamesh.
Why it matters: It is the oldest surviving systematically organised library in the world, and its rediscovery in the 1850s reopened the whole lost literature of Mesopotamia.
Sources- World History Encyclopedia. Ashurbanipal · reference
- 612 BCEReputable sourceWell documented
The Fall of Nineveh
A coalition of Babylonians and Medes besieged and destroyed Nineveh in 612 BCE. Within a few years the mighty Neo-Assyrian Empire — once the dominant power of the Near East — had collapsed entirely.
Why it matters: The sudden fall of Assyria was so complete that Nineveh was lost for over two thousand years, and it cleared the way for Babylon's final golden age.
Sources- World History Encyclopedia. Nineveh · reference
- 605–562 BCEReputable source · 2 sourcesWell documented
Nebuchadnezzar II and the Neo-Babylonian Empire
Nebuchadnezzar II made Babylon the largest and most splendid city on Earth, inheriting Assyria's territories and rebuilding the capital on a monumental scale.
Why it matters: His reign was the golden age of the Neo-Babylonian Empire and made Babylon a byword for wealth and grandeur that echoes through history and scripture.
Sources- World History Encyclopedia. Nebuchadnezzar II · reference
- World History Encyclopedia. Babylon · reference
- 587 BCEReputable sourceWell documented
The Destruction of Jerusalem and the Babylonian Exile
After a revolt, Nebuchadnezzar II captured Jerusalem, destroyed its Temple, and deported much of the population of Judah to Babylon — the event known as the Babylonian Captivity or Exile.
Why it matters: The Exile was a turning point for Judaism and one of the most consequential events in the history of the Bible, reshaping Jewish religion and identity.
Sources- World History Encyclopedia. Babylonian Captivity · reference
- 6th century BCEReputable source · 2 sourcesDebated
The Ishtar Gate and the Hanging Gardens
Nebuchadnezzar's Babylon was famed for the Ishtar Gate — a towering entrance faced with brilliant blue glazed bricks and images of dragons and bulls — and for the legendary Hanging Gardens, counted among the Seven Wonders of the Ancient World.
Why it matters: The Ishtar Gate survives (partly reconstructed in Berlin) as a masterpiece of ancient art; the Hanging Gardens became one of history's most famous wonders.
How we know: The Ishtar Gate is well-attested by excavated remains. The Hanging Gardens are described only in later texts and have never been definitively located, so whether — and where — they existed is debated.
Sources- World History Encyclopedia. Ishtar Gate · reference
- World History Encyclopedia. Hanging Gardens of Babylon · reference
- 1st millennium BCEReputable sourceWell documented
Babylonian Astronomy and the Zodiac
Babylonian scholars kept meticulous records of the night sky for centuries, tracking the planets, predicting eclipses, and dividing the sky into the twelve signs of the zodiac.
Why it matters: Their astronomical records and the zodiac they devised became the foundation of Greek astronomy and still underlie the constellations and star-signs we use today.
Sources- British Museum. Astronomical tablet · reference
- 539 BCEReputable source · 2 sourcesWell documented
The Fall of Babylon to Cyrus the Great
In 539 BCE, Cyrus the Great of Persia captured Babylon, ending the Neo-Babylonian Empire and absorbing Mesopotamia into the vast Persian Empire. The Cyrus Cylinder records his version of the conquest and his policies toward the conquered.
Why it matters: It ended three thousand years of Mesopotamian self-rule. The heartland that had invented cities, writing and law would never again be an independent power.
Sources- World History Encyclopedia. Cyrus the Great · reference
- British Museum. The Cyrus Cylinder · reference
Related timelines- Ancient Greece → — Persia's rise set the stage for its later clash with Greece