Sonargaon (Bengali: সোনারগাঁও; meaning City of Gold) was a historic administrative, commercial and maritime center in Bengal. Situated at the center of the Ganges delta, near the old course of the Brahmaputra River, it was the seat of the medieval Muslim rulers and governors of eastern Bengal. The area is located near the modern industrial river port of Narayanganj in Bangladesh.
Panam City was established in the late 19th century as a trading center of cotton fabrics during British rule. Hindu cloth merchants built their residential houses following colonial style with inspiration derived from European sources. Today this area is protected under the department of archaeology of Bangladesh.