Ratna Style (Bengali: রত্ন শিল্পরীতি) is a style of Bengal temple architecture, that originated in Bengal from the 15th to 16th centuries, under the Mallabhum kingdom (also called Malla dynasty).[1] Originating as a regional style in Hindu temple architecture. It is an extended style of the Chala temple.[2] The special feature of Ratna-style temples is the curved cornice of the chala.
Ratna-style temples were built all over Bengal. But most of the temples are found in the city of Bishnupur. In the present day, the temples are now located in two separate national territories: the Indian states of West Bengal and Tripura, and Bangladesh.