The Indus Valley Civilization, flourishing from 3300 to 1300 BCE, is recognized as the first urban civilization on the Indian subcontinent. Major cities like Harappa and Mohenjo-Daro were noted for advanced urban planning and significant archaeological contributions, while the civilization was characterized by a lack of grand monuments and a focus on communal living. The civilization's archaeological discovery, mainly during British colonial times, revealed a vast network with around five million inhabitants and extensive craftsmanship in metallurgy and seal carving.