Conference Organization
- President of the Organizing Committee and of the Program Committee of the International Conference Saint Andrew in History and in Art (program in .pdf format), in the program of the cultural events Patras Cultural capital of Europe 2006, under the auspices of the Ministry of Culture, the Metropolis of Patras, with the contribution of the University of Patras, the 6th Ephoria of Byzantine Antiquities, the University of Peloponnese and the Hellenic Open University (17-19/11/2006)
- President of the Organizing Committee and member of the Program Committee on Achaia: The Frankish, the Venetian and First Turkish Periods (program in .pdf format), (1-2/10/2005) at Achaia, Patras, with the collaboration of the 6th Ephoria of Byzantine Antiquitiesand the Historical and Ethnological Society of the Peloponnese and under the auspices of the Municipality of Deme in Achaia
- Organization of a Session in the Program of the 24th Annual Byzantine Studies Conference Association (7/11/1998), on Byzantine Urbanism in memory of A. Kazhdan. Speakers:
- W. Liebeschuetz (University of Notingham): The Uses and Abuses of the Concept of "Decline", with Special Reference to the Eastern Empire in the Sixth Century
- J. Patrich (University of Haifa): The Urban Ruralization in Provincia Palaestina: The Demise of the Byzantine Praetorium at Caesarea
- K. G. Holum (University of Maryland): Caesarea Palestinae: The Byzantine-Islamic Transition
- E. A. Ivison (City University of New York): Reconstructing and Deconstructing the Middle Byzantine City: A Reassessment of the Role of the State in the Revival of Urban Life
- Member of the Program Committee of the Annual Byzantine Studies Conference Association (1997-2000)
- Vice-President of the Program Committee of the 22nd Annual Byzantine Studies Conference Association (1997-1998)
- President of the Program Committee of the 21st Annual Byzantine Studies Conference Association, 25-28/09/1997), Madison, Wisconsin (1996-1997)