When one thinks of the world's first cities, Sumer, Memphis, and Babylon are some of the first to come to mind, but if the focus then shifts to India, then Harappa and Mohenjo-daro will likely come up. These cities owe their existence to India's oldest civilization, known as the Indus Valley Civilization or the Harappan Civilization, which was contemporary with ancient Mesopotamia and ancient Egypt and had extensive contacts with the former, making it one of the most important early civilizations in the world. Spread out along the rivers of the Indus River Valley, hundreds of settlements began forming around 3300 BCE, eventually coalescing into a society that had all of the hallmarks of a true civilization, including writing, well-developed cities, a complex social structure, and long-distance trade.

Mohenjo-daro was the largest city of the Indus Valley Civilization, one of the most advanced civilizations to have ever existed, and the best-known and most ancient prehistoric urban site on the Indian subcontinent. It was a metropolis of great cultural, economic, and political importance that dates from the beginning of the 3rd millennium BCE. Although it primarily flourished between approximately 2500 and 1500 BCE, the city had longer lasting influences on the urbanization of the Indian subcontinent for centuries after its abandonment. It is believed to have been one of two capital cities of the Indus Civilization, its twin being Harappa located further north in Punjab, Pakistan.

Kalibangan was unknown to the modern world until archaeologists began uncovering its secrets in excavations during the 1960s. Although it followed some of the patterns of larger Indus cities such as Mohenjo-daro and Harappa, it was also a unique city in many ways. Kalibangan was located on a different river from the other major Indus Valley Civilization cities, and its river suffered a fate that led to the end of the city.