In 1959, the country began the construction of its new capital city. 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. 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.