Mohenjo-daro (Mound of the Dead) is an archeological site in the province of Sindh, Pakistan. Built around 2600 BCE, it was one of the largest settlements of the ancient Indus Valley Civilization, and one of the world’s earliest major urban settlements, contemporaneous with the civilizations of ancient Egypt, Mesopotamia, and Crete. Mohenjo-daro was abandoned in the 19th century BCE, and was not rediscovered until 1922. Significant excavation has since been conducted at the site of the city, which was designated a UNESCO World Heritage Site in 1980. The site is currently threatened by erosion and improper restoration.
Mohenjo-daro is located in Larkana District on the right bank of the Indus River in Sindh, Pakistan, on a Pleistocene ridge in the middle of the flood plain of the Indus River Valley, around 28 kilometres (17 mi) from the town of Larkana. The ridge was prominent during the time of the Indus Valley Civilization, allowing the city to stand above the surrounding plain, but the flooding of the river has since buried most of the ridge in deposited silt. The site occupies a central position between the Indus River and the Ghaggar-Hakra River. The Indus still flows to the east of the site, but the riverbed of the Ghaggar-Hakra on the western side is now dry.
Mohenjo-daro was built in the 26th century BCE. It was one of the largest cities of the ancient Indus Valley Civilisation, also known as the Harappan Civilisation, which developed around 3000 BCE from the prehistoric Indus culture. At its height, the Indus Civilisation 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, with major urban centers at Harappa, Mohenjo-daro, Lothal, Kalibangan, Dholavira and Rakhigarhi. Mohenjo-daro was the most advanced city of its time, with remarkably sophisticated civil engineering and urban planning. When the Indus civilization went into sudden decline around 1900 BCE, Mohenjo-daro was abandoned.