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Medieval and early modern periods

Subsequent Muslim conquests helped spread Islam throughout the region. It was ruled by dynasties of the Bengal Sultanate and feudal lords under the Delhi Sultanate for the next few hundred years. The Bengal Sultanate was interrupted for twenty years by a Hindu uprising under Raja Ganesha. In the 16th century, Mughal general Islam Khan conquered Bengal. Administration by governors appointed by the court of the Mughal Empire gave way to semi-independence under the Nawabs of Murshidabad, who nominally respected the sovereignty of the Mughals in Delhi. Several independent Hindu states were established in Bengal during the Mughal period, including those of Pratapaditya of Jessore District and Raja Sitaram Ray of Bardhaman. Following the death of Emperor Aurangzeb and the Governor of Bengal, Shaista Khan, the proto-industrialised Mughal Bengal became a semi-independent state under the Nawabs of Bengal, and showed signs of the world's first Industrial Revolution. The Koch dynasty in northern Bengal flourished during the 16th and 17th centuries; it weathered the Mughals and survived until the advent of the British colonial era.