About Sivasagar
Sivasagar, the ocean of Shiva, is a city in and headquarters of the Sivasagar district Assam, India. The city gets its name from the big lake, Sivasagar Tank ( Borpukhuri ), situated in the heart of the city. The lake was commissioned by the Ahom king Siva Singha.It lies about 360 kilometres (224 mi) northeast of Guwahati. This city is surrounded by the Dehing rainforest, where the Dihing (Brahmaputra) and Lohit rivers meet. The Dikhow river flows in the east. Sivasagar, formerly known as Rangpur, was the capital of the Ahom Kingdom from 1699 to 1788.
Source: Wikipedia