Indus Valley Civilisation — Sites, Seals & Script

Why This Chapter Matters

The Indus Valley Civilisation (IVC) is one of the highest-scoring topics in the ancient India section of SSC CGL, CHSL, MTS, CPO and RRB NTPC exams. On average this topic alone gives 2 to 4 questions in a General Awareness paper, more if the exam also touches art and culture. Almost every question is a direct fact: which site had the dockyard, who excavated Mohenjodaro, what did archaeologists find at Lothal, in which country is Harappa located today. There is very little scope for interpretation-based questions here, so a clean list of site-feature-excavator combinations wins you marks.

Three sub-topics repeat the most: site identification (site name matched to its unique feature), the excavators and years of discovery, and the debate around the script and the decline of the civilisation. SSC has a clear pattern of asking "which of the following pairs is correctly matched" from site names and their special finds, so this chapter builds around tables you can revise quickly. Learn the site table first, then the seals and script section, then the theories of decline.

1. Discovery and Naming

The Indus Valley Civilisation is also called the Harappan Civilisation, named after the first site discovered, Harappa, on the bank of the river Ravi in present-day Punjab, Pakistan. The site was first noticed by Charles Masson in 1826, and later Alexander Cunningham, the father of Indian archaeology, visited it in 1853 and 1856 without recognising its antiquity.

Systematic excavation began under the Archaeological Survey of India (ASI), then headed by Sir John Marshall. Daya Ram Sahni excavated Harappa in 1921. Rakhal Das Banerji discovered Mohenjodaro ("Mound of the Dead") in Sindh in 1922. These two discoveries together established that a Bronze Age urban civilisation had existed in the Indian subcontinent well before the Vedic period. In 1924 John Marshall announced the discovery of this new civilisation to the world.

The civilisation is dated broadly from 2600 BCE to 1900 BCE in its mature, urban phase, though early or formative Harappan settlements go back to about 3300 BCE, and late Harappan or declining settlements continue to about 1300 BCE. This dating is largely based on radiocarbon (C-14) dating methods. It belongs to the Bronze Age, since its people knew the use of copper and bronze but not iron.

2. Extent

The Indus Valley Civilisation is the most widespread of the three earliest civilisations of the ancient world, larger in area than contemporary Egypt and Mesopotamia. It stretched from Sutkagendor in Baluchistan (Pakistan) in the west to Alamgirpur in Uttar Pradesh in the east, and from Manda in Jammu in the north to Daimabad in Maharashtra in the south. In terms of shape, the civilisation is roughly triangular, and most of its sites lie in present-day Pakistan and the Indian states of Gujarat, Haryana, Punjab and Rajasthan.

Interestingly, more Harappan sites have been found in India than in Pakistan after Partition, largely due to the extensive excavation of sites along the dried-up Ghaggar-Hakra river, identified by many scholars with the Rig Vedic Saraswati river. Rakhigarhi in Haryana, on this river system, is now considered the largest Harappan site by area.

The civilisation is generally divided into three phases:

• Early/Formative Harappan phase (about 3300–2600 BCE): village-based, pre-urban.
• Mature Harappan phase (about 2600–1900 BCE): full urbanisation, standard town planning, script, seals, weights.
• Late Harappan phase (about 1900–1300 BCE): decline of urban features, de-urbanisation, shift eastward.

3. Town Planning

Town planning is the single most distinct exam-worthy feature of this civilisation and is asked frequently in a "which of the following is a feature of the Harappan civilisation" format.

Harappan towns show the grid pattern: streets cut each other at right angles, dividing the town into rectangular blocks. Most sites had two clear parts: a smaller, elevated Citadel on the western side, built on a mud-brick platform, likely used for public buildings and granaries; and a larger, lower Lower Town to the east, where ordinary residents lived. This is seen most clearly at Mohenjodaro and Kalibangan; Lothal and Surkotada, being smaller sites, do not always show this two-part division as sharply.

The most striking feature is the drainage system, unmatched in its own time. Every house had its own soak pit and drain, and these joined larger covered drains running along the streets, built of burnt bricks with periodic manholes for cleaning. Houses were built mostly of standard-sized burnt bricks in a ratio of 4:2:1 (length:breadth:thickness), a ratio still used as a rough SSC trivia point. Houses had a central courtyard with rooms around it, and most had their own wells and bathrooms. Some larger houses had two or more storeys.

Notable structures include the Great Bath at Mohenjodaro, a large watertight tank built of burnt bricks with a layer of bitumen for waterproofing, used probably for ritual bathing; the Granaries at Harappa and Mohenjodaro for grain storage; and the massive Dockyard at Lothal, connecting the town to a channel of the sea for maritime trade.

There is no clear evidence of temples or palaces in the Harappan cities, unlike contemporary Egypt or Mesopotamia, which is itself an important negative fact often tested ("which of the following was NOT found at Harappan sites").

4. Major Sites

Each major site is associated with one or two distinctive finds. Memorise the site-feature-excavator combination as a set.

Site	River	Present state/country	Excavator(s)	Distinctive feature
Harappa	Ravi	Punjab, Pakistan	Daya Ram Sahni (1921)	First site discovered; granaries; two rows of six granaries; skeletons in unusual positions in a cemetery called Cemetery R-37
Mohenjodaro	Indus	Sindh, Pakistan	R.D. Banerji (1922)	"Mound of the Dead"; the Great Bath; the Great Granary; a bronze statue called the "Dancing Girl"; a steatite statue called the "Priest-King"
Dholavira	Luni (near Rann of Kutch)	Gujarat, India	R.S. Bisht (1990s)	Unique three-part division (citadel, middle town, lower town); a signboard with Harappan script letters; sophisticated water harvesting and reservoirs; stadium-like structure
Lothal	Bhogava, near Gulf of Khambhat	Gujarat, India	S.R. Rao (1955)	Artificial tidal dockyard for maritime trade; evidence of a fire altar; a terracotta ship; bead-making workshops; rice husk remains
Kalibangan	Ghaggar (dried-up Saraswati)	Rajasthan, India	B.B. Lal and B.K. Thapar	Evidence of a ploughed field (earliest known ploughed field); fire altars; both citadel and lower town were fortified; bangles of terracotta
Rakhigarhi	Ghaggar plain	Haryana, India	Amarendra Nath (ASI)	Largest known Harappan site by area; ancient DNA study evidence; suggests indigenous roots of the civilisation
Banawali	Saraswati (dried-up)	Haryana, India	R.S. Bisht	Radial street pattern (not fully grid-like); good quality barley found
Surkotada	near Rann of Kutch	Gujarat, India	J.P. Joshi	Earliest evidence of bones of the domesticated horse
Chanhudaro	Indus	Sindh, Pakistan	N.G. Majumdar	No citadel; a bead-making and bangle-making factory town; found an inkpot; a footprint of a dog chasing a cat preserved in a brick
Sutkagendor	Dasht	Baluchistan, Pakistan	George Dales	Westernmost site; a possible coastal trading outpost

A quick trick used by aspirants: sites on the coast or near tidal channels (Lothal, Dholavira, Sutkagendor) are linked to trade and dockyards; sites inland on old river courses (Kalibangan, Banawali, Rakhigarhi) show more agricultural evidence.

5. Seals and the Harappan Script

Harappan seals are among the most photographed artefacts of ancient India and a favourite for picture-based or fact-based MCQs. Most seals are square or rectangular, made of steatite (a soft stone), and show an animal figure with a short line of script above it. The most common animal shown is the unicorn bull (a one-horned bull, actually more like a composite bull). Other animals depicted include the tiger, elephant, rhinoceros, buffalo and goat. A notable seal found at Mohenjodaro shows a seated figure surrounded by animals, identified by John Marshall as a proto-Shiva or "Pashupati" seal, though this identification remains debated among historians and should be presented as a proposed identification, not a settled fact, in essay-type answers.

The Harappan script is pictographic, meaning it uses picture-based symbols rather than an alphabet, and it remains undeciphered to this day despite many attempted decipherments. It is generally agreed to be written boustrophedon style, meaning alternating direction: right to left in one line, then left to right in the next. Because the script cannot be read, we do not know the name the Harappans used for their own civilisation, their kings, or their religious beliefs with certainty; everything about their society is reconstructed from archaeological evidence alone. This absence of deciphered writing is one reason the Harappan period is still classified under "proto-history" rather than full history by many scholars, sitting between prehistory and history.

6. Economy

Agriculture was the backbone of the Harappan economy. Wheat and barley were the staple crops. Other crops included peas, sesame, mustard, cotton and, at some sites like Lothal, rice. The Harappans are credited as among the earliest people in the world to cultivate cotton, which the Greeks later called "sindon", a term derived from Sindh. Agricultural tools were mostly made of stone and wood; there is very little evidence of the use of the iron plough, since the civilisation belongs to the Bronze Age. A terracotta plough model was found at Banawali, and Kalibangan gives the earliest evidence of an actual ploughed field, with criss-cross furrow marks.

Animal husbandry included cattle (especially the humped bull, often shown on seals), buffalo, sheep, goat and pig. Evidence for the horse is scarce; the strongest single piece of evidence often cited in exam material is the bone remains at Surkotada, though this point is debated among archaeologists.

Trade was extensive, both inland and overseas, and was based on a barter system, since no true coins have been found at Harappan sites. Weights were made of stone, mostly in a cubical shape, and followed a system based on multiples of 16 (1, 2, 4, 8, 16, 32...), a fact SSC has tested directly. Standard weights and measures indicate strong state or civic control over trade. Overseas trade connected the Harappans with Mesopotamia; Harappan seals have been found at Mesopotamian sites, and Mesopotamian texts refer to a land called "Meluhha", generally identified with the Indus region, and to intermediate trading points called "Dilmun" (identified with Bahrain) and "Makan". Lothal's dockyard is the strongest single piece of evidence for maritime trade with the Persian Gulf and Mesopotamian region.

Craft production included bead-making (notably at Chanhudaro and Lothal), pottery (mostly red ware painted with black designs), bronze tool and figurine making using the lost-wax technique (as seen in the bronze "Dancing Girl"), cotton and wool textile weaving, and seal carving.

Metal use is another well-tested point. The Harappans knew copper, bronze, gold and silver, but there is no confirmed evidence of iron at any mature Harappan site, which is exactly why the civilisation is classed as a Bronze Age culture. Copper was likely brought in from Khetri in Rajasthan and from Baluchistan, while tin, needed to make bronze, probably came through trade from regions further west or from limited local sources; the exact source of Harappan tin is still debated among archaeologists, so exam material treats it as an open question rather than a settled fact. Gold ornaments have been found at several sites, but gold and silver were used for ornaments and vessels, not for coinage.

7. Society and Religion

Harappan society, based on uniform town planning, weights, bricks and script across a vast area, suggests a well-organised, centrally coordinated urban administration, though there is no direct evidence of kings, palaces or a standing army. Many scholars therefore describe Harappan governance as likely managed by a merchant class, a council, or a priestly elite, rather than a single monarch, but this remains an inference rather than a confirmed fact.

On religion, since the script is undeciphered, all conclusions are drawn from figurines, seals and structural remains. Points commonly tested:

• Worship of a Mother Goddess, based on numerous terracotta female figurines found across sites, suggesting a fertility cult.
• Possible worship of a proto-Shiva figure, based on the Pashupati seal from Mohenjodaro.
• Worship of trees (notably the peepal tree, shown on several seals) and animals (the bull in particular).
• Evidence of fire altars at Kalibangan and Lothal, suggesting some form of fire ritual, though not necessarily linked to later Vedic yajna practice.
• No structure has been confirmed as a temple, which is a key negative point for MCQs.
• Burial practices varied: complete burial (as at the Harappa cemetery), fractional burial (bones only), and post-cremation urn burial, suggesting a mix of practices rather than one single belief system.

8. Decline of the Civilisation

The mature urban phase declined gradually after about 1900 BCE, and by around 1300 BCE most late Harappan settlements had lost their urban features altogether. No single cause is fully accepted; SSC-level material presents this as a set of competing theories, and questions are usually of the "which historian proposed which theory" type.

Theory	Proposed by / associated with	Core idea
Aryan invasion	Mortimer Wheeler	Invading Aryans destroyed Harappan cities (skeletons at Mohenjodaro cited as evidence); this theory is now largely rejected by most historians for lack of solid evidence
Natural disasters / floods	Marshall, Mackay, and others	Recurring floods of the Indus, or tectonic activity changing river courses, destroyed cities repeatedly
Climate change / drying of rivers	Robert Raikes, D.P. Agrawal	Weakening of the monsoon and drying of the Ghaggar-Hakra (Saraswati) system reduced agricultural output
Ecological degradation	Fairservis and others	Overuse of land, deforestation for brick-kiln fuel, and soil exhaustion weakened the agrarian base
Decline of trade	General view	Loss of Mesopotamian trade contact reduced the economic surplus that supported urban life

The most widely accepted modern view combines climatic change (weakening monsoon, river shifts) with internal factors like overuse of resources, rather than a single dramatic invasion. As urban centres declined, populations dispersed eastward and southward into the Gangetic plains and Malwa/Deccan region, carrying forward some craft and agricultural knowledge into the succeeding Chalcolithic and Vedic-period cultures. That transition takes us into the Vedic Age, covered next.

Quick Revision — One-Line Facts

• Harappa was the first Harappan site discovered, excavated by Daya Ram Sahni in 1921 on the river Ravi.
• R.D. Banerji discovered Mohenjodaro ("Mound of the Dead") in 1922 in Sindh.
• John Marshall announced the discovery of the new civilisation to the world in 1924.
• The mature Harappan phase is dated about 2600–1900 BCE, based on C-14 dating.
• The Indus Valley Civilisation belongs to the Bronze Age.
• Westernmost site: Sutkagendor; easternmost: Alamgirpur; northernmost: Manda; southernmost: Daimabad.
• Rakhigarhi (Haryana) is the largest known Harappan site.
• Harappan towns show a grid pattern with roads cutting at right angles.
• Cities were divided into a Citadel (upper, western) and Lower Town (eastern).
• Standard burnt brick ratio was 4:2:1.
• The Great Bath at Mohenjodaro was made watertight using bitumen.
• The Dockyard at Lothal linked the town to a tidal channel for sea trade.
• Dholavira (Gujarat) shows a unique three-part town division and water reservoirs.
• Kalibangan (Rajasthan) has the earliest evidence of a ploughed field.
• Surkotada gives possible early evidence of the domesticated horse.
• Chanhudaro is known for bead-making and had no citadel.
• Most seals were made of steatite and show the unicorn bull most commonly.
• The Pashupati seal from Mohenjodaro is linked to a proto-Shiva figure.
• The Harappan script is pictographic and remains undeciphered.
• The script was likely written in boustrophedon style (alternating direction).
• Wheat and barley were the staple Harappan crops; cotton cultivation is a Harappan first.
• No true coins have been found; trade was based on barter.
• Harappan weights followed a system in multiples of 16.
• Mesopotamian texts refer to the Indus region as "Meluhha".
• No temple or palace structure has been confirmed at any Harappan site.
• Terracotta Mother Goddess figurines suggest a fertility cult.
• Fire altars have been found at Kalibangan and Lothal.
• Mortimer Wheeler proposed the Aryan invasion theory of decline, now largely rejected.
• Climate change and the drying of the Ghaggar-Hakra (Saraswati) river system is the most accepted decline theory today.
• The famous bronze "Dancing Girl" figurine, made using the lost-wax technique, was found at Mohenjodaro.
• Late Harappan settlements had lost urban features by about 1300 BCE.

Memory Tables

Table A: Site and Excavator/Discovery Year

Site	Discovered/Excavated by	Year	State/Country today
Harappa	Daya Ram Sahni	1921	Punjab, Pakistan
Mohenjodaro	R.D. Banerji	1922	Sindh, Pakistan
Chanhudaro	N.G. Majumdar	1931	Sindh, Pakistan
Lothal	S.R. Rao	1955	Gujarat, India
Kalibangan	B.B. Lal, B.K. Thapar	1953–61	Rajasthan, India
Surkotada	J.P. Joshi	1964	Gujarat, India
Banawali	R.S. Bisht	1974	Haryana, India
Dholavira	R.S. Bisht	1990s	Gujarat, India
Rakhigarhi	Amarendra Nath (ASI)	1990s	Haryana, India

Table B: Site and Unique Distinctive Feature

Site	Unique feature to remember
Mohenjodaro	Great Bath, Great Granary, Dancing Girl, Priest-King statue
Harappa	Granaries in two rows, cemetery R-37
Lothal	Dockyard, fire altars, bead-making, rice husk
Kalibangan	Ploughed field, fire altars, camel bones
Dholavira	Three-part town division, signboard, water reservoirs
Rakhigarhi	Largest site, ancient DNA study
Surkotada	Horse bone remains
Chanhudaro	No citadel, bead/bangle factory, inkpot
Banawali	Radial street layout, good barley grain

Practice MCQs

Q1. Who discovered the site of Harappa in 1921? (a) R.D. Banerji (b) Daya Ram Sahni (c) John Marshall (d) Mortimer Wheeler

Q2. Mohenjodaro is located on the bank of which river? (a) Ravi (b) Indus (c) Ghaggar (d) Sutlej

Q3. Which of the following is the westernmost site of the Indus Valley Civilisation? (a) Alamgirpur (b) Daimabad (c) Sutkagendor (d) Manda

Q4. The famous "Great Bath" has been found at which site? (a) Harappa (b) Mohenjodaro (c) Lothal (d) Dholavira

Q5. Which site is well known for its dockyard used for maritime trade? (a) Kalibangan (b) Lothal (c) Banawali (d) Surkotada

Q6. Which site provides the earliest evidence of a ploughed field? (a) Rakhigarhi (b) Kalibangan (c) Chanhudaro (d) Dholavira

Q7. The Indus Valley Civilisation belongs to which age? (a) Iron Age (b) Bronze Age (c) Paleolithic Age (d) Neolithic Age

Q8. Which of the following is currently regarded as the largest known Harappan site by area? (a) Mohenjodaro (b) Harappa (c) Rakhigarhi (d) Dholavira

Q9. Match the sites with their states correctly. Which one of the following pairs is INCORRECTLY matched? (a) Lothal — Gujarat (b) Kalibangan — Rajasthan (c) Banawali — Haryana (d) Harappa — Haryana

Q10. Most Harappan seals were made of which material and usually depicted which animal? (a) Terracotta; elephant (b) Steatite; unicorn bull (c) Bronze; horse (d) Sandstone; tiger

Q11. The Harappan script is best described as: (a) Alphabetic and deciphered (b) Pictographic and undeciphered (c) Phonetic and deciphered (d) Cuneiform and deciphered

Q12. Arrange the following in the correct chronological order of their discovery/excavation:

1. Lothal 2. Harappa 3. Mohenjodaro 4. Dholavira (a) 2-3-1-4 (b) 1-2-3-4 (c) 3-2-1-4 (d) 2-1-3-4

Q13. Which of the following statements about the Harappan civilisation is correct? (a) It had a well-developed iron technology (b) No clear evidence of a temple has been found at Harappan sites (c) Harappan trade was based on gold and silver coins (d) The Harappan script has been fully deciphered

Q14. Which historian originally proposed the "Aryan invasion" theory for the decline of the Harappan civilisation, a theory now largely rejected due to lack of evidence? (a) John Marshall (b) Mortimer Wheeler (c) D.P. Agrawal (d) R.S. Bisht

Q15. The Mesopotamian texts refer to the Indus region by which name, generally accepted by historians? (a) Dilmun (b) Makan (c) Meluhha (d) Elam

Answer Key

Q	Answer	One-line reason
Q1	(b)	Daya Ram Sahni excavated Harappa in 1921.
Q2	(b)	Mohenjodaro lies on the bank of the Indus in Sindh.
Q3	(c)	Sutkagendor in Baluchistan marks the western limit of the civilisation.
Q4	(b)	The Great Bath, waterproofed with bitumen, was found at Mohenjodaro.
Q5	(b)	Lothal's dockyard connected it to a tidal channel for sea trade.
Q6	(b)	Kalibangan preserves furrow marks of an actual ploughed field.
Q7	(b)	Harappans used copper and bronze, not iron, placing them in the Bronze Age.
Q8	(c)	Rakhigarhi in Haryana is now considered the largest Harappan site by area.
Q9	(d)	Harappa is located in Punjab, Pakistan, not Haryana.
Q10	(b)	Most seals are steatite and most commonly depict a unicorn bull.
Q11	(b)	The script uses picture symbols and remains undeciphered to date.
Q12	(a)	Order of excavation: Harappa (1921), Mohenjodaro (1922), Lothal (1955), Dholavira (1990s).
Q13	(b)	No structure at any Harappan site has been confirmed as a temple.
Q14	(b)	Mortimer Wheeler proposed the Aryan invasion theory, since largely discarded.
Q15	(c)	Mesopotamian records refer to the Indus region as "Meluhha".