Sophisticated sewer and water supply systems kept these cities clean, and their spacious streets formed a strict grid structure suggesting these sites were meticulously planned.
Their settlements of Harappa and Mohenjo-daro, for instance, housed approximately 40,000 to 50,000 individuals and featured baked-brick buildings. Sophisticated sewer and water supply systems kept these cities clean, and their spacious streets formed a strict grid structure suggesting these sites were meticulously planned.