'''Islamabad''' (; ) is the capital city of Pakistan, and is administered by the Pakistani federal government as part of the Islamabad Capital Territory. It is the ninth-largest city in Pakistan, while the larger Islamabad–Rawalpindi metropolitan area is the country's third-largest with a population of about 4.1 million people. Built as a planned city in the 1960s to replace Karachi as Pakistan's capital, Islamabad is noted for its high standards of living, safety, and abundant greenery.