 The fort complex was built under the supervision of Karan Chand , the Prime Minister of Raja Rai Singh , the sixth ruler of Bikaner , who ruled from 1571 to 1611 AD . Construction of the walls and associated moat commenced in 1589 and was completed in 1594 . It was built outside the original fort of the city , about 1 @.@ 5 kilometres ( 0 @.@ 93 mi ) from the city centre . Some remnants of the old fort are preserved near the Lakshmi Narayan temple . 
