Islamabad — Capital of Pakistan

Islamabad is a purpose-built capital, planned from scratch starting in 1958 under President Ayub Khan specifically to replace Karachi, Pakistan's largest city, which had served as an interim capital since independence in 1947 but was seen by the government as too commercially chaotic, too far from the country's political and military center of gravity, and too exposed on the coast to serve as a long-term seat of government.

The site chosen sits at the foot of the Margalla Hills, adjoining the older garrison city of Rawalpindi, and was selected partly for its cooler climate relative to Karachi and partly for its central position within what was then West Pakistan — a location seen as more defensible and more equidistant from the country's population centers than the port city it replaced.

The city's master plan was designed by Konstantinos Apostolou Doxiadis, a Greek architect and urban planner whose firm laid Islamabad out on a strict grid of numbered sectors, each intended to be a largely self-contained residential and commercial unit — a rigorously systematic approach to urban design that gives Islamabad a noticeably more orderly and spaced-out layout than most South Asian cities, which typically grew organically over centuries rather than being planned in a single mid-20th-century design exercise.

The transfer of the capital from Karachi happened gradually through the 1960s rather than in one single event, with government ministries relocating in phases as Islamabad's infrastructure was completed; by the time the move was finished, Karachi retained its status as Pakistan's largest city and primary commercial and financial center, a division of political and economic capital functions that persists today.

Islamabad's best-known modern landmark, the Faisal Mosque, was completed in 1986 with funding from Saudi Arabia and was for a time the largest mosque in the world; its dramatic modernist design, resembling a Bedouin tent rather than a traditional domed mosque, has made it one of the most recognizable buildings associated with the capital since its construction.

Islamabad functions administratively as a twin city with the much older Rawalpindi, a garrison town with roots stretching back centuries and home to the headquarters of the Pakistan Army; the two cities are treated in practice as a single connected urban area, with Rawalpindi supplying much of the older commercial and military infrastructure that the newly built capital lacked in its early decades.

The Margalla Hills, which form Islamabad's northern backdrop, were designated a national park in 1980, giving the capital an unusually direct and protected connection to forested, hiking-accessible hill terrain immediately adjacent to its government and diplomatic districts — a green buffer largely absent from most other South Asian capital cities of comparable size.

The Pakistan Monument, a flower-shaped structure completed in 2007 on the Shakarparian Hills overlooking Islamabad, symbolizes the country's four provinces and territories in its four main petals, and its museum documents the independence movement and the country's formation, giving the relatively young planned capital a dedicated national monument of its own distinct from the older historic sites found in Lahore or Karachi.

In July 2007, Islamabad's Lal Masjid (Red Mosque), located just blocks from government buildings, became the site of a violent week-long siege after security forces moved against militants who had occupied the mosque and an adjoining madrasa; the operation, which left well over a hundred people dead by various estimates, remains one of the most significant security crises to have played out within the capital itself rather than in Pakistan's more volatile border regions.

Islamabad's diplomatic enclave, a fenced and separately secured district housing most foreign embassies, reflects the heightened security posture the capital has maintained since the 2000s, when Pakistan became a frontline state in the war in neighboring Afghanistan and periodically saw militant attacks targeting Western missions and interests within the city.