A flourishing civilisation emerged on the banks of the river Indus in the second half of the third millennium BCE and spread across large parts of western India. This is what we know as Harappan civilisation or Indus Valley civilisation. A marked feature of this ancient civilisation was the vivid imagination and sensibilities exuded by the numerous sculptures, seals, potteries, jewelleries found at the excavation sites. Harappa and Mohenjo-daro - the two major sites of civilisation - are among the earliest and finest example of urban civic planning. The planned network of roads, houses and drainage systems indicate the planning and engineering skills that developed during those times.