The GMF is an independent organization endowed by the Federal Republic of Germany in gratitude for the Marshall Plan, for the rebuilding of Western Europe after WWII. Its mission is to promote cooperation between the "old" and "new" worlds, in the Arts, Economics, Political and Military affairs. The GMF is a elite and influential voice in global transatlantic affairs and policy. The GMF acquired a stately mansion and adjacent row house in the historic, "Embassy Row", Dupont circle neighbourhood of Washington DC for their new global Headquarters. OPX was hired to design it. The project called for the renovation & integration of the interior spaces of the row house and mansion. Both required historic preservation of the original limestone and brick facades as well as historic restoration of the elegant interior staterooms in the mansion. The project required extensive review and compliance with Historic preservation council, a complete reconstruction, of the row house behind its ornate brick facade, the addition of a fourth floor, excavation of the existing basement and the addition of a new stair and elevator towers for a state of the art Class A office, conference and reception venue. The design parti gives architectural expression to the mission statement of the organization with the harmonious integration of the old and new, traditional and modern; large and small, as a metaphor of how it is possible for the old and new world to maintain their individual identity and work together for a whole greater than the sum of their parts. Opening ceremony led by Ms Angela Merkl OF the federal republic of Germany.