Sivasagar {Pron: ˈsɪvəˌsʌgə(r) or ˈʃɪvəˌsʌgə(r)} ( Xiwôxagôr) previously spelled Sibsagar ("the ocean of Lord Shiva"), is a town in Upper Assam, about 360 kilometres (224 mi) north east of Guwahati. It is the district headquarters of the Sivasagar district.It is well known for its Ahom palaces and monuments. Sivasagar today is also an important centre for the tea and oil industries.