Constantinos Apostolou Doxiadis, Greek architect (b. 1913)
Constantinos A. Doxiadis (also Konstantinos; 14 May 1913 – 28 June 1975), often cited as C. A. Doxiadis, was a Greek architect and town planner. He was known as the lead architect of Islamabad, the new capital of Pakistan in the 1960s, and later as the father of ekistics, which concerns the science of human settlements.