Dhaka is the capital and the largest city of Bangladesh. It is the ninth-largest and the sixth-most densely populated city in the world, with a population of 8.9 million residents within the city limits, and a population of over 21 million residents in the Greater Dhaka Area. Dhaka is the economic, political, and cultural center of Bangladesh, and is one of the major cities in South Asia, the largest city in Eastern South Asia and among the Bay of Bengal countries; and one of the largest cities among OIC countries. As part of the Bengal plain, the city is bounded by the Buriganga River, Turag River, Dhaleshwari River and Shitalakshya River.
Dhaka is the financial, commercial and the entertainment capital of Bangladesh, and accounts for up to 35% of Bangladesh's economy. Since its establishment as a modern capital city the population, area, social and economic diversity of Dhaka have grown tremendously, the city is now one of the most densely industrialized regions in Bangladesh. Dhaka is a major beta-global city, as it hosts the headquarters of several international corporations. By the 21st century, it emerged as a megacity. The Dhaka Stock Exchange has over 750 listed companies. The city hosts over 50 diplomatic missions and the headquarters of BIMSTEC. The city's culture is known for its cycle-rickshaws, cuisine, art festivals and religious diversity. The old city is home to around 2000 buildings from the Mughal and British periods, including notable structures such as the Bara Katra and Choto Katra caravansaries.