Karachi is the capital of the province of Sindh, and the largest city in Pakistan. Located on the coast of the Arabian Sea, north-west of the Indus River Delta, the mega city is the largest city, original capital and cultural, economical, philanthropic, educational, and political hub, as well as the largest port, of the country.
The metropolitan area along with its suburbs comprises the world's second most populated city, spread over 3,530 square kilometers. The city credits its growth to the mixed populations of economic and political migrants and refugees from different national, provincial, linguistic and religious origins who have largely come to settle here permanently.
It is locally termed as the City of Lights for its liveliness and the City of The Quaid, for not only being both the birth and death place of Quaid-e-Azam Muhammad Ali Jinnah the founder of Pakistan but also his home after 1947. Residents and those born in the city are called "Karachiites".
The area of Karachi was known to the ancient Greeks by many names: Krokola, the place where Alexander the Great camped to prepare a fleet for Babylonia after his campaign in the Indus Valley; 'Morontobara' (probably Manora island near Karachi harbour), from whence Alexander's admiral Nearchus set sail; and Barbarikon, a port of the Bactrian kingdom. It was later known to the Arabs as Debal from where Muhammad bin Qasim led his conquering force into South Asia in 712 AD