History of Chittagong
The city of Chattogram (Chittagong) is traditionally centred around its seaport which has existed since the 4th century BCE. One of the world's oldest ports with a functional natural harbor for centuries, Chittagong appeared on ancient Greek and Roman maps, including on Ptolemy's world map. Chittagong port is the oldest and largest natural seaport and the busiest port of Bay of Bengal.