A privately owned, architecturally advanced building on Messogion Avenue in Athens, serves as the Headquarters of the Group. The building consists of six storeys, with total surface area of approx. 5,000m2, including office spaces, conference rooms, a staff dining room, as well as a multi- purpose conference hall with a seating capacity of 200 persons. The four underground levels, serve as parking lots for 100 vehicles. Designed by the Architects "Michael Hopkins and Partners", the building received the RIBA Awards 2004 from the Royal Institute of British Architects.