[1] Kamatapur emerged as a sovereign state in the middle of the 13th century, and it continued through fluctuating levels of prosperity until the year 1498, when its last capital at Gosanimari was attacked by the invading army of Alauddin Husain Shah of Bengal.

Through a long course of changes and developments the capital shifted to Maynaguri and then to Prithu Rajar Garh,[4] Singijani and finally Gosanimari, an ancient river port-town since the seventh century.

[5] Women wear patani from the chest till below the knee but it does not touch the ankle, the cloth stays about 6&cm above the ground.

Koch Rajbongshi People do not eat all kinds of animal some of them they consider as bad for there community if they kill (for e.g. crow) They don't kill doves or even they don't keep as pet in the house but if a dove comes and makes a nest, it is considered as good luck for the community and for the family.

Koch Rajbongshi people do not kill or eat peacock, but they do catch them to collect feathers for medicinal use before releasing the bird.