Conversation so far:
which city is the metropolitan city of pakistan
what is the capital of pakistan
The capital city of Pakistan is Islamabad
when did islamabad become the capital of pakistan
Islamabad officially became the capital of Pakistan on 14 August 1967
where is islamabad located
Islamabad is located in the Pothohar Plateau in the northeastern part of Pakistan, between Rawalpindi District and the Margalla Hills National Park to the north.

Question: who designed the city
Self-contained rewrite: who designed islamabad