Indus Valley civilization

The Indus Valley civilization was centered round the Indus River in India and Pakistan, and is the earliest known urban culture of the Indian subcontinent. Superimposed on earlier stone- and bronze-using cultures dating from c.4000 BC, the Indus Valley civilization centered around Harappa and Mohenjo-Daro, and lasted from c.2500 to c.1750 BC. About 100 of its towns and villages, some with fortified citadels, have been identified.