International Symposium of the International Federation of Landscape Architects (IFLA), "Aesthetic and Functional Values in Landscape Design", Athens, 1988, in collaboration with the Pan-Hellenic Association of Landscape Architects (PHALA) and the Hellenic Society for Aesthetics.

Anglo-Hellenic Symposium on Aesthetics, Athens, 1994, "Aesthetics in Education, Culture and Tradition", in collaboration with the Hellenic Society for Aesthetics.

Conference on "Children and Aesthetic Education", Athens, 1996, in collaboration with the Hellenic Society for Aesthetics.

Franco-Hellenic Symposium on Aesthetics, Athens, 1997, "L'art comme Contestation", in collaboration with the Hellenic Society for Aesthetics.

International Conference, "Art and Landscape", Athens, 1998, in collaboration with the International Federation of Landscape Architects (IFLA) and the Pan-Hellenic Association of Landscape Architects (PHALA).

First Mediterranean Congress of Aesthetics, Athens, 2000, "Aesthetics on the Threshold of the Third Millennium", in collaboration with the Hellenic Society for Aesthetics.

Executive Committee Meeting of the IAA (International Association for Aesthetics), Athens, 2003. The Conference "New Perspectives in Aesthetics and Philosophy of Art" was organised as part of the meeting in collaboration with the Hellenic Society for Aesthetics.