The scientific editing of this volume was undertaken by the Center of Excellence entitled "Utilization of Orthodox Heritage and Interreligious Dialogue" of the National and Kapodistrian University (NKUA) of Athens, in the framework of the collaboration provided in the relevant Memorandum of Understanding. Mrs. Ioanna Stoufi-Poulimenou, Professor of Christian Archaeology and Art, Department of Theology, NKUA has been appointed to be scientific responsible for the publication. The churches dedicated to the Wisdom of God included in the volume are to be the landmarks of the "European Route of the Monuments of the Wisdom of God (Hagia Sophia)". The application will be submitted in the form of a comprehensive joint proposal of the Center of Excellence and the Interparliamentary Assembly on Orthodoxy (I.A.O.) with the aim of recognizing it as a Cultural Route of the Council of Europe.