Mathura on the banks of yamuna is reputed to be the birthplace of Krishna at the centre of Vraja, called Krishnajanmabhoomi, literary 'Krishna's birth place'.
The Keshav Dev temple was built in ancient times on the site of Krishna's legendary birthplace (an underground prison). As per the epic Mahabharata and per Bhagavata Purana, Mathura was the capital of the Surasena Kingdom, ruled by Kamsa the maternal uncle of Krishna.