The Indus Valley Civilization which is also known as Bronze age civilization started around 3300 BC and flourished in between 2600 - 1900 BC and started to decline in 1800 BC.
The government of Chhattisgarh decided to name Naya Raiur, the ucoming capital city of Chhattisgarh, as Atal Nagar in memory of Ex Prime Minister Atal Bihari Vajpayee.