karachi is the largest city in the world
Karachi Karachi (Urdu: کراچی‎; ALA-LC: Karācī, IPA: [kəˈraːˌtʃi] ( listen); Sindhi: ڪراچي‎) is the capital of the Pakistani province of Sindh. It is the most populous city in Pakistan,[11][12] sixth most populous city proper in the world[13][14] and the 8th most populous metropolitan city in the world.[15] Ranked as a beta world city,[16][17] the city is Pakistan's premier industrial and financial centre.[18] Karachi is also Pakistan's most cosmopolitan city.[19] Situated on the Arabian Sea, Karachi serves as a transport hub, and is home to two of Pakistan's two largest seaports, the Port of Karachi and Port Bin Qasim, as well as the busiest airport in Pakistan.
Islamabad In 1958, a commission was constituted to select a suitable site for the national capital with particular emphasis on location, climate, logistics, and defence requirements along with other attributes. After extensive study, research, and a thorough review of potential sites, the commission recommended the area northeast of Rawalpindi in 1959.[27][30] A Greek firm of architects, Konstantinos Apostolos Doxiadis, designed the master plan of the city based on a grid plan which was triangular in shape with its apex towards the Margalla Hills.[31] The capital was not moved directly from Karachi to Islamabad; it was first shifted temporarily to Rawalpindi in the early sixties and then to Islamabad when the essential development work was completed in 1966.[32]