Islamabad Capital Territory: History
In 1960, land was transferred from the Rawalpindi District of Punjab province to replace the Karachi Federal Capital Territory and establish Pakistan's new capital. According to the 1960s master plan, the territory included much of what was Rawalpindi, and composed of the following parts:
Rawalpindi, 259 square kilometres (100 sq mi)
Islamabad Urban, 220.15 square kilometres (85.00 sq mi)
Margalla Hills, 220.15 square kilometres (85.00 sq mi)
Islamabad Rural, 466.20 square kilometres (180.00 sq mi)
However, Rawalpindi was eventually excluded from the Islamabad master plan in the 1980s.