This was the first of the Indus Valley Civilisation sites to be discovered, but in size and condition it is inferior to Moenjodaro. Located 186 km south-west of Lahore, Harappa is reached via the station at Sahiwal, formerly known as Montgomery. Situated beside an earlier course of the Ravi River, Harappa was discovered in 1920/21, but through the ages the site was quarried for bricks and most of the buildings so far excavated are in poor condition.  Like Moenjodaro the excavations have revealed a series of cities, stacked one upon another. The site, with its citadel and great granary, seems similar in many ways to Moenjodaro and like its southern sister-city appear to have thrived around 2000 to 1700 BC with an economy based largely on agriculture and trade. The Harappan society seems to have been egalitarian, pursuing a rather simple way of life.