Hellenikon Air Base Hellenikon Air Base Hellenikon Air Base is a decommissioned United States Air Force base located in Athens, Greece. After its closure, it was redeveloped into Ellinikon International Airport. The airport was built in 1938, and after the German invasion of Greece in 1941, Kalamaki Airfield was used as a Luftwaffe air base during the occupation. Following the end of World War II, the Greek government allowed the United States to use the airport from 1945 until 1993. Known as Hassani Airport in 1945, it was used by the United States Army Air Forces as early as 1 October 1945, as
Hellenikon Metropolitan Park forward and a preliminary agreement has been signed to sell some of the land to Qatari investors for development. The site of the future Hellenikon Metropolitan Park is the former Athens International Airport at Hellenikon. In 2005, the international team led by architects David Serero, Elena Fernandez and landscape architect Philippe Coignet won the international competition to design a metropolitan park on the former site of the Hellenikon Airport, over more than 300 teams of architects. The competition was sponsored by UIA (International Union of Architects), the Greek Ministry of Environment and the Organization for the Planning and Environmental Protection