Sonargaon is the ancient capital of Isa Khan's kingdom in Bengal. It is located near the current-day city of Narayanganj, Bangladesh. The great Muslim traveler Ibn Battuta visited Sonargaon in the 14th century. It is thought that when a squadron of the Chinese fleet of Zheng He, commanded by the eunuch Hong Bao, visited Bengal in 1432, they visited Sonargaon as well. The information about that expedition comes from the book of one of its participants, the translator Ma Huan.[1] Sonargaon is the eastern terminus of the Grand Trunk Road, which was built by Sher Shah Suri, extended approximately 2500 kilometres from Bangladesh across northern India to Peshawar in Pakistan's North-West Frontier Province.

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