Sonargaon is located in Bangladesh

Sonargaon (Bengali: সোনারগাঁও; also transcribed as Sunārgāon, meaning City of Gold) was a historic administrative, commercial and maritime centre in Bengal. Situated in the centre of the Ganges delta, it was the seat of the medieval Muslim rulers and governors of eastern Bengal. Sonargaon was described by numerous historic travellers, including Ibn Battuta, Ma Huan, Niccolò de' Conti and Ralph Fitch as a thriving centre of trade and commerce.

• http://en.wikipedia.org/wiki/Sonargaon