The culture of Bengal defines the cultural heritage of the Bengali people native to eastern regions of the Indian subcontinent, mainly what is today Bangladesh and the Indian states of West Bengal and Tripura, where the Bengali language is the official and primary language. Bengal has a recorded history of 1,400 years. The Bengali people are its dominant ethnolinguistic group. The region has been a historical melting point, blending indigenous traditions with cosmopolitan influences from pan-Indian subcontinental empires. Bengal was considered to be the richest part of Islamic medieval India and during the era of the Bengal Sultanate it was described to be a major trading nation in the world, while during Mughal times, having triggered the proto-industrialization, its economy was worth 12%