Hariharnath Temple is located at Sonepur
, which is 25 km north of Patna
, in Bihar
. It is dedicated to the combined form of Lord Vishnu
and Lord Shiva
There is a belief that this shrine was built by Lord Ram, on his way to Janakpur to rescue Sita. A large number of devotees assemble here on full moon day of Kartik, which falls during October-November.