Patna is the capital of Bihar. It is the largest city of Bihar. It is one of the oldest city of the wolrld. Patna became significant around the year 490 BCE when Ajatashatru, the king of Magadha, wanted to shift his capital from the hilly Rajagrha to a more strategically located place to combat the Licchavis of Vaishali. He chose the site on the bank of the Ganges and fortified the area.