Published by Vedanta at February 1, 2007 In the 1920s, when archeologists were excavating a ruined city near the Indus River, they discovered a huge chapter of Indian cultural history that had been long forgotten. Four and a half thousand years earlier, Mohenjo-daro had been one of the largest cities of the Bronze Age world, with broad avenues, marketplaces and residential districts, a municipal sanitation system, and impressive public buildings.