The document discusses the architectural characteristics and town planning principles of the Indo-Aryan or Vedic age in India. It describes how early towns and villages were planned according to religious texts and treatises. Circular plans made of timber and thatch later evolved into planned settlements with streets and zones for religious, residential and commercial areas. Fort design and layout of towns and villages are also discussed, outlining 12 types of forts and 20 types of towns. Principles of selecting auspicious sites based on soil quality and drainage are provided from ancient texts.