- Polichronatou, Heleni, (2015), «The influence of Art Project in Forest Ecosystems and Social Structures» Scientific Conference "Environment and Protected Areas - World Environment Day 2015", Organized by Department of Forestry and Natural Environment Management, Department of Agriculture and Food technology & Nutrition, (Technological University of Lamia), the Association of Students of Forestry and the Municipality of Karpenissi.
- Polichronatou, Heleni, (2015), «Art - Ecology - Environment and Greek Reality» "Conference Greens – Solidarity-Issues and Perspectives in Higher Education"
- Polichronatou, Heleni, (2015), «Kifissos river of our city: a challenge for dialogue between Science and Art», Symposium of the Association of Greek Physicists, "Science and Art - The decoding of their relationship by creating " Harokopion University of Athens.
- Polichronatou, Heleni, (2013), «Text, Concepts and Symbols in modern Work of Art in Architecture and Environment», Symposium "Ut Pictura Poesis - like painting so the Poetry - image and word, painting as writing and writing as an image: Multimodal texts in the 21st century school " ASFA (Athens School of Fine Arts), Athens.
- Polichronatou, Heleni, (2012), «The relevance of time as the central theme of artistic research and an important component of artistic structure», Association of Greek Physicists with the collaboration of the Municipality of Haidari, "The Science and Art ......in Space and Time" Cultural Center Haidari, Athens.
- Polichronatou, Heleni,(2012), «Large Scale Art Project and the connection with the environment and ecology», Association of Greek Physicists, , Municipality of Palaio Faliro, "The science and art as timeless quest of man", Paleo Faliro, Athens.
- Polichronatou, Heleni, (2011), «The role of the artist in contemporary society and the large-scale work of art within the ecological movement», 9o Environmental Conference the Association of Greek Physicists under the auspices of the Prefecture of Imathia Regional Directorate A / Primary and B / Secondary Education Central Macedonia, Municipality of Naoussa, in cooperation with the Environmental Education Center Naoussa, "Natural and Anthropogenic Environment" Agios Nikolaos Naoussa.
- Polichronatou, Heleni, (2010) «Art and Environment in the 20th Century», Association of Art Teachers Secondary Education the Topic "Setting - Art - Human", ASFA (Athens School of Fine Arts), Athens.
- Polichronatou, Heleni, (2010) «The large-scale work of art, the connection with the utopian vision and new perspective», Association of visual artists Dodecanese under the auspices of the Municipality of Rhodes Museum of Modern Art, "For the new Art" Nestorideion Melathro, Rhodes.
- Polichronatou, Heleni, (2010) «Art and Legislation», Artistic School Gerakas - Parents Association, "Art School Luxury or Necessity"Journalists’ Union of Athens Daily Newspapers, Athens.
- Polichronatou, Heleni, (2010) «Ecology and Structured Property. Technology Development and Ecological Destruction». Conference Union Association of Greek Physicists, Department of Home Economics and Ecology of Harokopio University "Art and Environment", Harokopion University, Athens.
- Polichronatou, Heleni, (2010) «Art and Environment in the 20th Century», Centre for Contemporary Art, "The contribution of public sculpture and architecture to urban regeneration. Greek and international experience " State Museum of Contemporary Art(Moni Lazariston) & Contemporary Art (Warehouse B1, port of Thessaloniki), Thessaloniki.
- Polichronatou, Heleni, (2009) «Environment. The priority of the artists second half of the 20th century », World Environment Day, "Reflections: Art - Nature and Environment", ASFA (Athens School of Fine Arts),Athens.
- Polichronatou, Heleni, (2009) «Environment and Art - Visual / Acoustic Approach», "2nd Ecological Symposium. Environment Relations, Society and Education"ECO Cultural Centre of Athens, Athens.
- Polichronatou, Heleni, (2008) «Ecology - Arts - Environment» Forum Open Dialogue, European Cultural Antenna of Preveza Forum Cultures, "Man - Art - Environment" Cultural Center of the Municipality of Preveza, Preveza.
- Polichronatou, Heleni, (2008) «Visual Assistance and its position Artist / Teacher in new schools», OLME (Greek Federation of Secondary Education State School Teachers)"School Programs and Books on Secondary Education" Cultural Center Municipality of Chania, Chania.
- Polichronatou, Heleni, (2008) «Environmental Art and Ecology» Workshop the environment in the context of hostage taking and "9 women report converse with the environment ", Municipality of Ios.
- Polichronatou, Heleni, (2004) «The Ecological Vision of Artist», 1st Interdisciplinary Conference of Science and Art, Association Greek Physicists and University of the Aegean "Projects and Ideas for the Environment. Sustainability as a target of Sciences and Arts " Syros.
- Polichronatou, Heleni, (2002) «Social and cultural dimension of public works of art and pedagogical character», second International Conference Pan- Mediterranean Network F-A-M “The spirit of education in a Culture of Peace.The Decisive Role of Women. The Importance of Art in this Education " Rhodes.
- Polichronatou, Heleni, (1997) «Art workshops in local government, Teaching Art in the Municipalities of Non-formal Education Art». Precongress the Greek Chamber of Fine Arts, "The Greek reality and the position of art in Education", Athens.