In the 1960s and 1970s, urban planner and architect Constantinos Doxiadis authored books, studies, and reports including those regarding the growth potential of the Great Lakes Megalopolis. At the peak of his popularity, in the 1960s, he addressed the US Congress on the future of American cities, his portrait illustrated the front cover of "Time Magazine", his company Doxiadis Associates was implementing large projects in housing, urban and regional development in more than 40 countries, his Computer Centre (UNIVAC-DACC) was at the cutting edge of the computer technology of his time and at his annual "Delos Symposium" the World Society of Ekistics attracted the worlds foremost thinkers and experts.