Athens, September 30, 2004

    To whom it may concern

    This letter provides the opportunity to attest that Mr. Athanasios Sklavenitis elaborated for the office of SANTIAGO CALATRAVA SA the landscape and irrigation designs for the Olympic Stadium in the framework of the 2004 Olympic Games. He also supervised for our office, the application of designs during the Project’s construction.

    Our cooperation with Mr. A. Skalvenitis was excellent from a technical and scientific standpoint. His contribution was decisive in the timely implementation, without problems, of the most important project in the framework of the Olympic Games and ensured the Aesthetic Unification of the Olympic Stadium grounds.

    For the Office of SANTIAGO CALATRAVA SA

    The office Manager

    Leonidas Kikiras