sentences:  Harappan architecture
  
  Harappan architecture is the architecture of the Indus Valley Civilization, an ancient society of people who lived during circa 3300 BCE to 1300 BCE in the Indus Valley of modern-day India and Pakistan.The civilisation's cities were noted for their urban planning, baked brick houses, elaborate drainage systems, water supply systems, clusters of large non-residential buildings, and new techniques in handicraft (carnelian products, seal carving) and metallurgy (copper, bronze, lead, and tin).