Lothal: The Indus Valley Port and Its Ancient Dockyard

Lothal was a small Bronze Age town of the Indus Valley Civilisation, built near the Gulf of Khambhat in today’s Gujarat, India. It flourished above all between about 2200 and 1900 BC, when it was a busy centre for bead-making, shell-working and trade. Lothal is best known for a huge brick-lined basin that its excavator interpreted as a tidal dockyard, possibly the oldest in the world, although this reading remains disputed.

Discovery and excavation

After the partition of British India in 1947, the best-known Indus cities, Harappa and Mohenjo-daro, lay in Pakistan. Indian archaeologists therefore began to search for Harappan sites on the Indian side of the border, especially in Gujarat and Rajasthan.

In 1954 S. R. Rao of the Archaeological Survey of India identified a low mound near the village of Saragwala as a Harappan site. Its local name, Lothal, is usually translated as “mound of the dead”. Rao directed excavations from 1955 to 1960 and published his results in several reports, most fully in the 1970s and 1980s.

The digging showed a town of modest size, covering roughly 4.8 hectares inside its outer embankment. It was far smaller than the great cities of the Indus plain. Yet its finds, from seals and weights to beads and a foreign seal from the Persian Gulf, made it one of the most important Harappan sites in India.

The town and its phases

Lothal was occupied for several centuries. Rao divided its history into an earlier Harappan phase (often given as c. 2400–1900 BC) and a later, poorer phase (c. 1900–1600 BC). Radiocarbon dates suggest that the mature, most prosperous town belongs mainly to the late third millennium BC, around 2200–1900 BC. As with all Indus chronology, these dates are approximate.

The town was laid out on a planned grid, as in other Harappan settlements. A raised area, usually called the acropolis, held larger buildings, paved bathing areas and drains. The lower town contained houses, workshops and a market street. Walls of mud brick and baked brick, and a massive surrounding embankment, protected the settlement from floods, which the excavations show were a recurring danger.

On the acropolis stood a warehouse built on a high platform of mud-brick blocks, with channels between them that may have allowed air to circulate. Around 65 clay sealings were found in it. These were lumps of clay once pressed onto bundles of goods and stamped with seals, and they still bear impressions of the reeds, mats and cloth used for packing. They show that goods were stored, checked and sent on from here.

The great basin: dockyard or reservoir?

The structure that made Lothal famous lies on the eastern side of the town. It is a rectangular basin of baked brick, roughly 215 metres long and 35–37 metres wide, with walls more than four metres high. Rao argued that it was a dock connected by a channel to an old course of the Sabarmati river, which in turn led to the sea.

In his reconstruction, ships entered at high tide through an inlet, and a spillway with a wooden gate controlled the water level so that boats stayed afloat at low tide. He pointed to stone objects that he identified as anchors, to the nearby warehouse, and to the nautical setting near the Gulf of Khambhat. A terracotta model of a boat was also found at the site.

Not everyone agreed. In 1968 the archaeologist Lawrence Leshnik argued that the basin was more likely a reservoir that stored fresh water for drinking and for irrigating fields, an important resource in a region where groundwater can be salty. Other scholars have noted that it is hard to prove that the channels Rao described were open to ships, or that sea vessels needed a dock of this size.

Today both views have supporters. Some researchers have pointed to the chemistry of sediments in the basin as evidence of marine water; others remain unconvinced. A fair summary is that Lothal had a very large engineered water basin whose purpose is still debated. The popular phrase “the world’s oldest dockyard” reflects one interpretation, not a settled fact.

Craft workshops and the bead factory

Whatever the basin’s purpose, Lothal was clearly a manufacturing town. In the lower town archaeologists found a bead factory with a central courtyard, rooms and a kiln or furnace for heating stones. Heating changes the colour of agate into the deep red of carnelian, which was highly prized across the ancient Near East.

The workshop produced beads of carnelian, agate, jasper and other stones. Thousands of finished and unfinished beads were recovered, together with stone drills used to bore long, fine holes through them. Indus beads of this type reached Mesopotamia, where examples have been found in the Royal Cemetery at Ur.

Lothal’s craftspeople also worked shell, especially the conch shell from the nearby coast, making bangles, inlays and ladles. Copper and bronze tools, beads of gold, and ivory objects were made or used at the site. Standard Harappan cubical weights and a finely marked ivory scale show that measurement was carefully controlled.

Trade with the Persian Gulf and beyond

Lothal stood at the edge of the Harappan world, close to the sea and to the raw materials of Gujarat: semi-precious stones, shell and cotton. It probably acted as a collecting point, gathering goods from its hinterland and passing them on along the coast or inland.

The most famous evidence of long-distance contact is a round stamp seal of a type known from the Persian Gulf, often called a “Persian Gulf seal”. Seals of this style are associated with Dilmun, a trading centre usually identified with Bahrain. Mesopotamian texts of the later third millennium BC describe ships from Meluhha, generally thought to be the Indus region, bringing carnelian, timber and other goods.

It would be wrong, however, to picture Lothal as a great international harbour. Most of its trade was probably regional, linking the settlements of Gujarat with each other and with the Indus heartland. Imports from far away are rare, and many of the town’s goods could have travelled by small coastal boats.

Decline of the town

Floods struck Lothal several times, and around 1900 BC the town seems to have suffered severe damage. Afterwards it was reoccupied, but the later settlement was poorer. Fine Harappan pottery, seals and writing became rare, and the large public works were not maintained.

This pattern matches what happened across much of the Indus region in the early second millennium BC, when cities shrank and people moved to smaller villages. The wider story is told in the article on the decline of the Indus Valley Civilisation. By around 1600 BC Lothal had been abandoned.

By the numbers

Timeline

• c. 2400 BC: First Harappan settlement at Lothal, according to the excavator’s phasing.
• c. 2200–1900 BC: Most prosperous period: planned town, basin, warehouse and bead factory in use.
• c. 1900 BC: Severe flooding; the town declines and is rebuilt on a smaller, poorer scale.
• c. 1600 BC: Final abandonment of the site.
• 1954: S. R. Rao identifies the mound as a Harappan site.
• 1955–1960: Excavations by the Archaeological Survey of India uncover the town and basin.
• 1968: Lawrence Leshnik argues that the basin was a reservoir rather than a dock.

Why it matters

Lothal shows that the Indus Valley Civilisation reached far beyond the river valleys of Pakistan, into the coastlands of Gujarat. Its workshops, sealings and Gulf-type seal give a rare close-up view of how Harappan craftspeople produced valuable goods and how those goods moved through trade networks. And the long debate about its basin is a reminder that famous labels in archaeology are often interpretations that need to be tested.