The name of the ancient civilization that lived in the Indus Valley is the Indus Valley Civilization (IVC), also known as the Harappan Civilization. This civilization thrived from approximately 2600 to 1900 BCE, covering parts of present-day Pakistan and northwest India. The IVC is noted for its advanced urban planning, including well-organized street grids, sophisticated drainage systems, and large-scale granaries. Major cities like Harappa and Mohenjo-Daro showcase impressive architecture and artifacts, indicating a high level of social complexity and trade. The reasons for its decline around 1900 BCE remain a subject of study among historians.