The firm was founded in 1958 by its Chairman, Thymio Papayannis, architect, planner and conservationist. Thymio Papayannis has directed a large number of architectural, land and urban planning studies; among his most significant projects in Greece are as the coordinator for the National Spatial Plan of Greece and the Faliron Bay Regeneration Project, which also included an Interim Phase for the Athens 2004 Olympics. In 2009, he was awarded an honorary doctorate by the Athens Agricultural University for his contribution to the preservation of the environment. He was one of the two founders of WWF Greece, where he served as President between 1996-2004, 2005-2006 and 2009-2011. He is also the founder and current president of the Society for the Protection of Prespa, and has contributed to the establishment of the Greek Biotope – Wetland Centre. He has served on the boards of WWF International and the Tour du Valat and Sansouire foundations in the Camargue. In 2009, WWF International nominated him as a Member of Honour. His most important international activities include establishing and coordinating MedWet (Mediterranean Wetlands Initiative of the Ramsar Convention), coordinating the Ramsar Culture Working Group and the IUCN Delos initiative, and directing Med-INA (the Mediterranean Institute on Nature and Anthropos).