Greece categorically condemns Turkey’s decision to convert Hagia Sophia to a mosque. This decision, taken 85 years after Hagia Sophia was declared a museum, is an affront to its ecumenical character. Furthermore, it is a decision that offends all those who recognize Hagia Sophia as an indispensable part of world cultural heritage. This decision clearly affects not only Turkey’s relations with Greece but also its relations with the European Union, UNESCO, and the world community as a whole. It is a truly regretful development that the Turkish leadership, after working for the Alliance of Civilizations in 2005, has now taken the decision to reverse course.