The Rang Ghar (Assamese: [ɹɔŋɡʱɔɹ]), (rong ghor meaning "House of Entertainment") is a two-storeyed building which once served as the royal sports-pavilion where Ahom kings and nobles were spectators at games like buffalo fights and other sports at Rupahi Pathar (pathar meaning "field" in Assamese) - particularly during the Rongali Bihu festival in the Ahom capital of Rangpur.

It was later rebuilt with brick by Swargadeo Pramatta Singha in 1744 - 1751 A.D.[2][3] The roof of the Rang Ghar is shaped like an inverted royal Ahom long boat.

The Ahoms, who used special, thin, baked bricks, did not use cement but a paste of rice and eggs as mortar for their construction, a pulse called Maati Maah and a fish named Borali Mach in Assamese.

The adjoining field, known as Rupohi Pothar, wore a festive look when games like bull-fight, cock-fight, elephant fight, wrestling, etc., were held on different occasions during the Ahom rule.

Frequent earthquakes and seismic surveys being undertaken by the Oil and Natural Gas Corporation are posing a threat to Assam's 18th century amphitheatre Rang Ghar.