Mohenjo-daro was built in the 26th century BC. It was one of the largest cities of the ancient Indus Valley Civilization, which developed around 3000 BC from the prehistoric Indus culture. At its height, the Indus Civilization spanned much of what is now Pakistan and North India, extending westwards to the Iranian border, south to Gujarat in India and northwards to an outpost in Bactria. There were major urban centers at Harappa, Mohenjo-daro, Lothal, Kalibangan, Dholavira and Rakhigarhi. 