aThe Indus-Sarasvati (or Hakra) civilisation was located around the Indus and GhaggarHakra rivers; divided chronologically into four eras it stretches in time from the Neolithic period to the Iron Age. When examining the technological and cultural advances of this society, the period in which the Early Harappan phase (part of the Regionalisation era) develops into the Mature Harappan phase (Integration era), that is from 2800-2200BCE is of particular interest. In studying the developments of this society it is essential to take into account its various urban centres in order to compare and contrast, centres examined include Harappa, Mohenjo-daro (both in modern day Pakistan), Kalibangan and Lothal (in modern India). Various qualities that indicate a high level of technological and cultural advancement include the ample archaeological evidence of municipal town planning, in particular regards to the well developed hygiene facilities, an analysis of Mature Harappan subsistence methods (and how they developed from Early Harappan practices), evidence of developed trade routes over both land and sea, the detailed, highly crafted pottery and seals found at many of the sites and the mysterious undeciphered Harappan symbol script. Nearly all of the Mature Harappan sites discovered (406 in Pakistan, 616 in India) have shown ample archaeological evidence of forethought in the planning and though the sites span an area of over 2.5 million square miles, similarities in architectural devices appear. The location of many of the Harappan settlements is conditioned by river flooding patterns (to be returned to later in examination of subsistence practices), climate, the accessibility of natural resources and by the external and internal trade routes that existed. With populations ranging between 35-41,000 peoplei he cities themselves had various layouts, most likely for utilitarian purposes, both Harappan and Mohenjo-daro have a citadel mound that is quite distinct from the lower…