The Portuguese obtained permission. to establish their factories in Satgaon and Chatgaon by the then ruler of Bengal, Ghiyasuddin Mahmud Shah. After that Portuguese colonies were set up in whole Bengal. Chatgaon, known as the great port of Portuguese maritime was used by them but in the 16th century Satgaon declined and was replaced by Hooghly. Dutch built a fort named Fort Gustavus in Chinsurah. Serampore was a major centre of Danes. ....Read more