The document summarizes key aspects of the Harappan civilization, one of the earliest civilizations in South Asia. It discusses how the civilization was named after its type site of Harappa. Major cities included Harappa, Mohenjo-Daro, and Lothal, where excavations beginning in the 1920s uncovered evidence of the civilization. The Harappan civilization developed between 2600-1800 BCE along the Indus River valley, with large urban settlements, standardized weights and measures, advanced drainage systems, and international trade networks. While much remains unknown about the civilization due to its undeciphered writing system, archaeological findings provide insights into its urban planning, architecture, arts, and eventual decline around 1800 BCE.