Doxiadis Associates is an architecture firm founded by Greek architect and urban planner Constantinos A. Doxiadis in 1951. In its early days, the firm took on a number of important planning projects in Middle Eastern countries, including the development plan for Islamabad, built as a new city and capital of Pakistan in 1959. The firm continued to operate after its founder's death in 1975 and today covers a number of fields of specialization in projects of international scope.

Sources: 

Koutamanis, Alexander. "Doxiadis, Constantinos A.." Grove Art Online. Published Online 2003. Accessed June 25, 2019. https://doi.org/10.1093/gao/9781884446054.article.T023532

 

Doxiadis Associates Website. Accessed June 25, 2019. http://www.doxiadis.com