What was the Indus Valley Civilization?

The Indus Valley Civilization, also called the Harappan Civilization, was a Bronze Age civilization that flourished in the Indus and Ghaggar-Hakra river valleys of present-day Pakistan and north-west India. Its mature phase lasted from about 2600 to 1900 BCE, and it is known for large planned cities, covered drains, standard bricks and weights, seals, and a script that has not yet been deciphered.

Why is it also called the Harappan Civilization?

Archaeologists often name a culture after the first site where it was identified. Harappa, in Punjab in present-day Pakistan, was the first city of this civilization to be excavated, in 1921, so the civilization is also called the Harappan Civilization.

When did the Indus Valley Civilization exist?

Its roots go back to farming villages such as Mehrgarh from about 7000 BCE. The Early Harappan phase ran from about 3300 to 2600 BCE, the Mature Harappan phase of great cities from about 2600 to 1900 BCE, and the Late Harappan phase, when cities declined, from about 1900 to 1300 BCE.

What were the main cities of the Indus Valley Civilization?

The largest cities were Mohenjo-daro in Sindh, Harappa in Punjab, Ganweriwala in Cholistan, Rakhigarhi in Haryana, and Dholavira in Kutch, Gujarat. Other important sites include Lothal, Kalibangan, Chanhudaro, Banawali, Surkotada, and Kot Diji.

Has the Indus script been deciphered?

No. Around 4,000 or more inscribed objects, mostly small stamp seals, have been found, with about 400 or more different signs. The inscriptions are very short, and no bilingual text has been found, so the script remains undeciphered despite many attempts.

Did the Indus people trade with other civilizations?

Yes. Indus seals, beads, and weights have been found in Mesopotamia and the Persian Gulf, and Mesopotamian texts from around 2300 BCE mention ships from a land called Meluhha, which most scholars identify with the Indus region. The Indus people traded carnelian beads, cotton, timber, ivory, and other goods.

Why did the Indus Valley Civilization decline?

There was no single cause. Most scholars link the decline after about 1900 BCE to a weakening monsoon and drier climate, shifting and drying rivers such as the Ghaggar-Hakra, and the breakdown of long-distance trade. People gradually left the big cities for smaller villages, especially towards the east and south. The old idea of a sudden invasion is not supported by evidence.

Who discovered the Indus Valley Civilization?

Harappa’s ruins were described by Charles Masson in the 1820s and visited by Alexander Cunningham, who found a seal there in the 1870s. Daya Ram Sahni excavated Harappa in 1921 and R. D. Banerji worked at Mohenjo-daro in 1922, and in 1924 Sir John Marshall, Director-General of the Archaeological Survey of India, announced the discovery of a new civilization.

Which Indus sites are UNESCO World Heritage Sites?

The archaeological ruins at Mohenjo-daro in Pakistan were inscribed as a UNESCO World Heritage Site in 1980, and Dholavira in Gujarat, India, was inscribed in 2021.

Civilizations Timeline

Indus Valley Civilization Timeline: Mehrgarh Farmers → Early Harappan Towns → Great Planned Cities → Trade & Script → Decline → Rediscovery

Q: What made Harappan cities special?

Harappan cities were carefully planned, with straight streets, a raised citadel and a lower town, houses of standard-sized baked bricks, private wells and bathrooms, and covered drains running along the streets. Mohenjo-daro’s Great Bath and Dholavira’s stone reservoirs show remarkable skill in managing water.

More than 4,500 years ago, along the Indus and Ghaggar-Hakra rivers, people built some of the world’s first planned cities, with straight streets, baked-brick houses, private bathrooms, and covered drains. The Indus Valley or Harappan Civilization grew from early farming villages, flourished from about 2600 to 1900 BCE across a larger area than Egypt or Mesopotamia, slowly declined, and was forgotten until archaeologists rediscovered it in the 1920s.

This timeline covers Mehrgarh, early Harappan towns and the Kalibangan ploughed field, Harappa, Mohenjo-daro, Dholavira, Rakhigarhi, Lothal, and other sites, the Great Bath, drains, standard bricks and weights, seals and the undeciphered script, beads, bronze, and cotton, trade with Mesopotamia, theories of decline, the 1924 announcement of the discovery, excavations in India and Pakistan, UNESCO World Heritage Sites, and the civilization’s legacy.

c. 7000 BCE Mehrgarh → c. 3300 BCE Early Harappan c. 2600–1900 BCE Great Cities 1921 Harappa Dug → 1924 Discovery Announced

Why the Indus Valley Civilization Matters

The Indus Valley Civilization is one of the world’s earliest urban civilizations, alongside Mesopotamia and Egypt. Its people planned cities, managed water, standardised bricks and weights, traded across the seas, and developed a script — all without leaving behind grand palaces, royal tombs, or signs of large armies. Many everyday things in South Asia, from cotton cloth and bangles to bullock carts and clay toys, echo this ancient world.

Big picture

The Indus Valley Civilization in one view

Farmers settled at Mehrgarh around 7000 BCE, walled towns and early signs appeared from about 3300 BCE, great planned cities flourished from about 2600 BCE, trade reached Mesopotamia and the Persian Gulf, cities slowly emptied after about 1900 BCE as climate and rivers changed, and archaeologists revealed the civilization to the world in 1924. Related timelines: homes then and now, irrigation, water transport.

7000 BCE

Farming begins at Mehrgarh (approx.)

2600 BCE

Great planned cities flourish

1,000+

Sites found in India and Pakistan

1924

Discovery announced to the world

Split image with a reconstructed Indus Valley city street around 2500 BCE on the left, lined with two-storey baked-brick houses and a covered brick drain, where people in simple cotton garments walk beside a bullock cart, and the same kind of street today on the right as excavated brick ruins under a blue sky with visitors walking along a path — A busy Harappan street reimagined, and the brick ruins visitors see today (artistic illustration).

Harappan Life Then vs South Asia Now

Feature	Harappan city (c. 2500 BCE)	Today
Town planning	Grid-like streets, citadel and lower town	Planned cities such as Chandigarh, and smart city plans
Drainage	Covered brick drains along streets	Underground sewers, though many towns still lack them
Bricks	Standard ratio of 1:2:4	Standard modern bricks
Water	Private wells, reservoirs, and the Great Bath	Piped water, tanks, and rainwater harvesting
Weights and measures	Standard cube-shaped stone weights	Metric system and digital scales
Writing	Short inscriptions on seals, still undeciphered	Many scripts, printing, and digital text
Trade	Boats to the Persian Gulf and Mesopotamia	Container ships and global trade
Farming	Wheat, barley, pulses, cotton, and cattle	The same crops, plus rice, sugarcane, and many more
Transport	Bullock carts with solid wheels and river boats	Bullock carts still in villages, beside roads, rail, and air
Ornaments	Shell and faience bangles, carnelian beads	Bangles and beads remain popular across South Asia

🌾 Farmersc. 7000 – 3300 BCE

First Farmers of Mehrgarh

Long before the cities, people at the edge of the Indus plains learned to farm and herd animals. At Mehrgarh, near the Bolan Pass in Balochistan, villagers lived in mud-brick houses, grew wheat and barley, kept goats, sheep, and humped cattle, and gradually developed crafts that would later flourish in the Indus cities.

Reconstructed Neolithic village at the foot of dry hills where women grind grain on stone querns beside baskets of grain and clay pots, a man carries a bundle of harvested barley, humped cattle and goats stand in a wooden pen, and rows of small mud-brick houses climb the slope in golden light — Villagers grind grain and herd cattle in an early farming settlement (artistic illustration).

c. 7000 BCE: Farming begins at Mehrgarh, one of the earliest farming villages in South Asia, with wheat, barley, and domesticated goats and sheep.
c. 7000–5500 BCE: Mehrgarh villagers keep humped zebu cattle, build multi-room mud-brick houses, and even drill teeth, among the earliest evidence of dentistry in the world.
c. 6000–4000 BCE: Traces of cotton, copper, and pottery appear, and farming villages spread across Balochistan and towards the Indus plains.
c. 4000–3300 BCE: Villages grow larger, potters use the wheel and paint pots with bold designs, and trade in shells and stones links hills, plains, and coast.

Technology

Mud bricks: Sun-dried houses.
Grinding stones: Querns for grain.
Potter’s wheel: Later in this period.

Features

Farming: Wheat and barley.
Herding: Zebu cattle and goats.
Village life: Settled homes.

🧱 Early Townsc. 3300 – 2600 BCE

Early Harappan Towns

In the Early Harappan phase, villages along the Indus and Ghaggar-Hakra rivers grew into walled towns. People began to standardise their pottery, bricks, and settlement layouts, farmers ploughed their fields, and the first signs that may be early writing were scratched onto pots.

Reconstructed early Harappan walled mud-brick town beside a river under a hazy sky, with a farmer ploughing dark furrows using a wooden plough pulled by two humped oxen in the foreground, and potters beside a smoking kiln painting large red pots with black geometric designs among date palms — Farmers plough and potters paint pots outside an early walled town (artistic illustration).

c. 3300–2800 BCE: The Ravi phase settlement grows at Harappa, and marks scratched on pottery there are among the earliest possible signs of Indus writing.
c. 2800–2600 BCE: The Kot Diji phase sees fortified towns with walls of mud brick in Sindh, Punjab, and beyond.
c. 2800 BCE: At Kalibangan in Rajasthan, farmers plough a field in a criss-cross pattern, one of the earliest ploughed fields found in the world.
c. 3000–2600 BCE: Early settlements begin at sites such as Dholavira and Rakhigarhi, and styles of pottery, bricks, and ornaments become similar across a wide region.

Technology

Ploughs: Ox-drawn wooden ploughs.
Kilns: Fired painted pottery.
Town walls: Mud-brick defences.

Features

Walled towns: Growing populations.
Shared styles: Across regions.
Early signs: Marks on pots.

🏛️ Citiesc. 2600 – 2300 BCE

The Great Planned Cities

Around 2600 BCE the Mature Harappan period began. Large cities rose with a raised citadel and a lower town, streets laid out in a grid-like pattern, houses of standard baked bricks, private wells and bathrooms, and covered drains. Similar bricks, weights, seals, and pottery were used across hundreds of kilometres.

Reconstructed Great Bath of an Indus citadel, a large rectangular sunken pool of finely fitted baked bricks with steps at both ends, surrounded by a brick colonnade and small rooms, where a few people in white cotton robes stand beside the still water with brick buildings of the citadel rising behind in soft morning light — The Great Bath of Mohenjo-daro as it may have looked (artistic illustration).

c. 2600 BCE: Mohenjo-daro and Harappa grow into great cities, with Mohenjo-daro perhaps home to around 40,000 people.
c. 2600–2500 BCE: The Great Bath, about 12 by 7 metres and 2.4 metres deep, is built on Mohenjo-daro’s citadel and made watertight with fitted bricks and bitumen.
c. 2600–2300 BCE: Baked bricks in a 1:2:4 ratio, covered drains, hundreds of wells, and large public buildings appear, and cities such as Dholavira, Rakhigarhi, Ganweriwala, and Kalibangan flourish.
c. 2500 BCE: Craftspeople make the bronze “Dancing Girl” and the stone “Priest-King”, two of the most famous artworks of the civilization, both found at Mohenjo-daro.

Technology

Baked bricks: Standard sizes.
Covered drains: Along every street.
Lost-wax casting: Bronze figures.

Features

Planned cities: Citadel and lower town.
Great Bath: Public water structure.
Standardisation: Across a huge region.

⛵ Tradec. 2300 – 1900 BCE

Trade, Crafts & Script at Their Height

At its height the civilization stretched from Afghanistan to Gujarat and from Balochistan to western Uttar Pradesh. Merchants traded beads, cotton, timber, and ivory by land and sea, craftspeople made fine seals and ornaments, and short inscriptions in the Indus script were stamped on goods and sealings.

Reconstructed Harappan port with a long brick-lined dock basin where boats with woven square sails are moored, workers carry clay jars and bundles along the quay, and a bearded merchant in a white turban weighs goods on a balance beside baskets of red beads, white shell bangles, and cloth bundles, with brick warehouses behind — Merchants weigh beads and load boats at a Harappan port (artistic illustration).

c. 2300 BCE: Texts of Sargon of Akkad in Mesopotamia mention ships from Meluhha, a land most scholars identify with the Indus region.
c. 2400–1900 BCE: Lothal in Gujarat grows as a bead-making and trading town with a large brick basin, often described as a dockyard, and Chanhudaro becomes a centre of bead making.
c. 2300–1900 BCE: Indus seals, carnelian beads, and weights reach Mesopotamia and the Persian Gulf, and a trading outpost at Shortugai in Afghanistan obtains lapis lazuli.
Mature phase: Thousands of seals carry animal motifs such as the “unicorn” and short inscriptions, and Dholavira’s north gate displays a large signboard of ten Indus signs.

Technology

Stamp seals: Carved steatite.
Bead drilling: Long carnelian beads.
Standard weights: Cube-shaped stones.

Features

Sea trade: Gulf and Mesopotamia.
Fine crafts: Beads, bangles, bronze.
Indus script: Still undeciphered.

🏜️ Declinec. 1900 – 1300 BCE

Late Harappan Decline

After about 1900 BCE the great cities slowly emptied. Seals, writing, and standard weights fell out of use, long-distance trade faded, and people moved into smaller villages, especially towards the east and south. Most scholars now see this as a gradual change linked to climate and rivers, not a sudden destruction.

Dry, cracked riverbed beside the crumbling brick walls of a half-abandoned town in hazy golden light, where a family in simple cotton clothes with two children walks beside a bullock cart loaded with pots and bundles, followed by goats, towards distant green fields — A family leaves a declining town beside a dried-up river (artistic illustration).

c. 2200 BCE onwards: A drier climate and weaker monsoon, seen in many parts of the world around this time, put pressure on farming.
c. 1900 BCE: Rivers such as the Ghaggar-Hakra shrink or change course, trade with Mesopotamia declines, and big cities including Mohenjo-daro begin to be abandoned.
c. 1900–1300 BCE: Regional Late Harappan cultures, such as Cemetery H in Punjab, Jhukar in Sindh, and Rangpur in Gujarat, continue in smaller settlements.
c. 1300 BCE onwards: Settlements spread into the Ganga-Yamuna plains and elsewhere, and elements of Harappan farming and crafts continue in later Indian cultures.

Technology

Simpler pottery: Regional styles.
Farming shifts: Millets and rice grow.
Crafts continue: Beads and copper.

Features

De-urbanisation: Cities empty.
Migration: East and south.
Gradual change: Not sudden collapse.

⛏️ Rediscovery1826 – Today

Rediscovery & Legacy

For thousands of years the Indus cities lay buried and forgotten. Travellers and railway builders noticed the ancient bricks, but only in the 1920s did archaeologists realise they had found a whole lost civilization. Excavations in India and Pakistan continue to reveal new sites, and scientists still study its script, people, and environment.

Sepia 1920s excavation with long trenches exposing ancient baked-brick walls, where labourers in turbans carry baskets of earth, an archaeologist in a sola topi measures a brick wall with a rod beside wooden sieves, and another archaeologist in khaki writes notes next to a camera on a tripod on a flat, dusty plain — Archaeologists and workers uncover brick walls in the 1920s (artistic illustration).

1826–1875: Charles Masson describes the ruins of Harappa, railway builders in the 1850s use its bricks as ballast, and Alexander Cunningham publishes a strange seal found there.
1921–1924: Daya Ram Sahni excavates Harappa (1921), R. D. Banerji works at Mohenjo-daro (1922), and John Marshall announces a new civilization in September 1924.
1947–2005: After Partition, Indian archaeologists excavate Ropar, Lothal, Kalibangan, Banawali, Dholavira, and Rakhigarhi, showing how far the civilization extended into India.
1980–Today: Mohenjo-daro becomes a UNESCO World Heritage Site (1980), a 2019 ancient DNA study from Rakhigarhi sheds light on Harappan ancestry, and Dholavira is inscribed by UNESCO (2021).

Technology

Excavation: Trenches and layers.
Radiocarbon dating: Dating the past.
Ancient DNA: Studying people.

Features

Lost civilization: Found in 1924.
Sites in two nations: India and Pakistan.
World Heritage: Mohenjo-daro, Dholavira.

Major Indus Valley Sites

Reconstructed deep rectangular stone reservoir with long flights of stone steps descending to green water, where people fill clay pots at the bottom, and the stone walls of a city with a castle on a raised mound rise behind, with white salt flats and scrubland stretching to the horizon under a clear sky — A stone reservoir at Dholavira in the dry Kutch region as it may have looked (artistic illustration).

Site	Where	Known for
Mehrgarh	Balochistan, Pakistan	Early farming village, roots of the civilization
Harappa	Punjab, Pakistan	First city excavated (1921), granary-like buildings
Mohenjo-daro	Sindh, Pakistan	Great Bath, drains, Dancing Girl, Priest-King
Chanhudaro	Sindh, Pakistan	Bead-making workshops
Ganweriwala	Cholistan, Pakistan	One of the largest cities, little excavated
Rakhigarhi	Haryana, India	Largest known Indus site in India, ancient DNA study
Kalibangan	Rajasthan, India	Early ploughed field, fire altars
Banawali	Haryana, India	Fortified town, clay model of a plough
Dholavira	Kutch, Gujarat, India	Stone reservoirs, signboard, UNESCO site (2021)
Lothal	Gujarat, India	Brick basin or dockyard, bead making
Ropar	Punjab, India	One of the first sites excavated in independent India
Shortugai	Afghanistan	Trading outpost near lapis lazuli sources

How a Harappan City Worked

Feature	What it was like
Citadel	A raised, walled area with large public buildings
Lower town	Homes and workshops of ordinary people
Streets	Main streets laid out in a grid-like pattern, with smaller lanes
Houses	Rooms around a courtyard, often with a well and a bathroom
Drains	Covered brick drains with inspection holes along the streets
Wells	Hundreds of brick-lined wells at Mohenjo-daro
Great Bath	A large watertight pool, possibly for ritual bathing
Storehouses	Large buildings often called granaries (their use is debated)
Reservoirs	Huge stone reservoirs at Dholavira to store water
Walls and gates	City walls and gateways at many sites

Famous Finds, Crafts, and the Indus Script

Reconstructed Harappan craft workshop where one artisan carves a humped bull and symbols into a square dark stone seal, another drills long red carnelian beads with a bow drill, and a basket of red beads, white shell bangles, a small bronze figurine, a terracotta toy cart, and an oil lamp lie on the stone floor — Artisans carve a stamp seal and drill carnelian beads (artistic illustration).

Find	Where found	What it tells us
“Dancing Girl” bronze	Mohenjo-daro	Skill in lost-wax metal casting
“Priest-King” bust	Mohenjo-daro	Fine stone carving and dress
“Unicorn” seals	Many sites	Most common seal motif, used in trade
“Pashupati” seal	Mohenjo-daro	Seated figure surrounded by animals, meaning debated
Indus script	Seals, tablets, pottery	About 400 or more signs, still undeciphered
Dholavira signboard	Dholavira	Ten large signs, perhaps a city name
Stone weights	Many sites	A shared system of measurement
Carnelian beads	Chanhudaro, Lothal, Mesopotamia	Skilled crafts and long-distance trade
Terracotta toys and carts	Many sites	Children’s play and solid-wheeled carts
Cotton fragments	Mohenjo-daro and Mehrgarh	Among the earliest uses of cotton in the world

Why Did the Cities Decline? Main Theories

Theory	Evidence	How scholars see it today
Weaker monsoon, drier climate	Lake and cave records of drying from around 2200 BCE	Widely accepted as a major factor
Rivers drying or shifting	Old channels of the Ghaggar-Hakra and Indus	Widely accepted as important
Floods	Layers of silt at some sites	Possible local factor
Loss of trade	Fewer Indus goods in Mesopotamia after c. 1900 BCE	Likely part of the story
Disease and overuse of land	Some skeletal and environmental studies	Possible contributing factors
Sudden invasion	An old idea from the 1940s	Not supported by evidence

Indus Valley Civilization Timeline Summary

Year / Era	Milestone
c. 7000 BCE	Farming begins at Mehrgarh
c. 5500 BCE	Early dentistry and crafts at Mehrgarh
c. 3300 BCE	Early Harappan phase; early signs on pots at Harappa
c. 2800 BCE	Ploughed field at Kalibangan; walled towns
c. 2600 BCE	Mature Harappan cities begin
c. 2500 BCE	Great Bath; Dancing Girl and Priest-King
c. 2300 BCE	Mesopotamian texts mention Meluhha
c. 2200 BCE	Climate becomes drier
c. 1900 BCE	Cities begin to decline
c. 1900–1300 BCE	Late Harappan regional cultures
1826	Charles Masson visits Harappa
1850s	Harappa bricks used for railway ballast
1875	Cunningham publishes a Harappan seal
1921	Daya Ram Sahni excavates Harappa
1922	R. D. Banerji at Mohenjo-daro
1924	John Marshall announces the civilization
1950s–1960s	Ropar, Lothal, and Kalibangan excavated in India
1980	Mohenjo-daro becomes a UNESCO World Heritage Site
1990–2005	Major excavations at Dholavira
2019	Rakhigarhi ancient DNA study
2021	Dholavira becomes a UNESCO World Heritage Site
Future	Deciphering the script and protecting the sites

Timeline understanding Archaeology Map skills Heritage awareness

Make a timeline poster: c. 7000 BCE Mehrgarh, c. 3300 BCE Early Harappan, c. 2600 BCE great cities, c. 1900 BCE decline, 1921 Harappa excavated, and 1924 discovery announced.
On a map of India and Pakistan, mark Harappa, Mohenjo-daro, Rakhigarhi, Kalibangan, Lothal, and Dholavira.
Draw a plan of a Harappan city with a citadel, a lower town, streets, houses, wells, and drains.
Design your own “seal” with an animal and a few symbols, and explain what it might tell a trader.
Compare the drainage system of Mohenjo-daro with the drains in your own street or town.
Make a clay model of a Harappan toy cart with solid wheels.
List five things we still use today that the Indus people also used.
Write a diary entry as a child living in Mohenjo-daro around 2500 BCE.
Research why the Indus script is so hard to decipher, and suggest what clues might help.
Debate: “Climate change, not invasion, ended the Indus cities.”

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The Indus Valley story connects to how homes, irrigation, money and trade, and boats developed over thousands of years. Explore these connected timelines next.

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Moments Through Visual Stories

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The Indus Valley Civilization in pictures — the first farmers, an early walled town, the Great Bath, a busy port, seal carvers and bead makers, a stone reservoir, the decline, the 1920s excavations, and then versus now.

First Farmers

Mehrgarh

Early Town

Walls and ploughs

Great Bath

Mohenjo-daro

Port & Trade

Sea trade

Seals & Beads

Master crafts

Reservoir

Dholavira

Decline

Rivers run dry

Rediscovery

1920s excavations

Then vs Now

Streets to ruins

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Disclaimer: This content is AI-generated for educational purposes and may contain errors or outdated details. For correct and authoritative information, please refer to official and reliable sources such as government publications, manufacturers, museums, and academic references.

Indus Valley Civilization Timeline: Mehrgarh Farmers → Early Harappan Towns → Great Planned Cities → Trade & Script → Decline → Rediscovery

Why the Indus Valley Civilization Matters

The Indus Valley Civilization in one view

Harappan Life Then vs South Asia Now

First Farmers of Mehrgarh

Technology

Features

Early Harappan Towns

Technology

Features

The Great Planned Cities

Technology

Features

Trade, Crafts & Script at Their Height

Technology

Features

Late Harappan Decline

Technology

Features

Rediscovery & Legacy

Technology

Features

Major Indus Valley Sites

How a Harappan City Worked

Famous Finds, Crafts, and the Indus Script

Why Did the Cities Decline? Main Theories

Indus Valley Civilization Timeline Summary

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Moments Through Visual Stories

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