- 1991, Egnatiaof Epirus Foundation: Diasselo Conference Centre, Metsovo: Permanent exhibition of Diploma Thesis entitled “Conference Centre in Metsovo”.
- June 1994, Old University (Cleanthis Residence) – Athens:
“At Home in the City – Intensification of the Town Center, Pyrgos – Ilias, Hellas”, ΕUROPAN -3. (D. Abakoumkin with M. Katsaros).
- 1994, Ν.Α.Ι. – ROTTERDAM:
“At Home in the City – Intensification of the Town Center, Pyrgos – Ilias, Hellas”, ΕUROPAN -3, (D. Abakoumkin with M. Katsaros).
- -Oct. 1995, “Mylos” & Municipality of Thessalonica-Thessalonica: ΕUROPAN exhibition, (D. Abakoumkin with M. Katsaros).
- June 1996, MAINZ-BUNDESREPUBLIK DEUTSCHLAND
“Constructing the town upon the town – The periphery of Gοrlitz-Zgorzelec/ Bundesrepublik Deutschland-Polska”. ΕUROPAN – 4.
- 2004, Municipality of Ioannina Cultural Centre.
Exhibition of Entries for the Pan-Hellenic Architecture Competition of Ideas for the Unification and Rejuvenation of Ioannina Town Centre Public Spaces”.
- 2004, Techno polis, Gazi, “Young Greek Architects 4th Biennale”, Exhibition of Shortlisted Projects. (Organized by the Hellenic Institute of Architecture).
- March 2005, New Benaki Museum, Exhibition of Architecture Awards 2004, (Organized by the Hellenic Institute of Architecture).
- 2007, New Benaki Museum,“Young Greek Architects 5th Biennale”, “Exhibition of shortlisted Projects”, (Organized by the Hellenic Institute of Architecture).
- March 2008, New Benaki Museum,“The shape of Place, 40 years “Architecture in Greece”, (Organized by the Hellenic Institute of Architecture).
- April 2009, New Benaki Museum, Exhibition of Architecture Awards 2008, (Organized by the Hellenic Institute of Architecture).
- March 2011, Zappeio Megaro, Exhibition of Architecture Awards, 2010(Organized by the Association of Greek Architects).
- National Technical University of Athens, Averoff Building, June 1990, Lecture on:
“Photography”, (D. Abakoumkin with K.Morianou).
- National Technical University of Athens,June 1992, Lecture:
“Traditional anti seismic Design of Structures in Lefkada”, (Y. Kavaddas)
- National Technical University of Athens, October 1993, Lecture:
“The process and purpose of travel in relation to architecture”, (A. Kaloyiannis with I. Exarhou).
- Ν.Α.Ι. (Netherlands Architectural Institute), Sept. 1994, Presentation of the ΕUROPAN -3 competition entry:
“At Home in the City – Intensification of the Town Center, Pyrgos – Ilias, Hellas”, (D. Abakoumkin with M. Katsaros).
- Museum of Byzantine Civilization – Thessalonica: Sept. 1996: ΕUROPAN – Hellenic Ministry for the Environment, Physical Planning & Public Works.
“European seminar on the implementation of the ΕUROPAN projects”, (D. Abakoumkin).
- Palazzo Dei Congressi – E.U.R. ROMA – March. 1997, Participant in European Forum Εuropan- 4 :
“Constructing the Town, Upon the Town – Implementation of the Europan – 3 Projects”, (D. Abakoumkin with M. Katsaros).
- National Research Institute, Athens – Nov. 2001.
“Young Greek Architects and New Urban Landscapes. Europan’s contribution”. Exhibition of Works (1994-2001).
- Diasselo Conference Centre, Metsovo, May 2003.
Conference on the “Preservation of Local Cultural Heritage” – Environmental Structures, (D. Abakoumkin).
- Athinais Multicentre, Athens, May 2004. Participation in the European Forum Europan -7:
“Sub-urban challenge, urban intensity and housing diversity”.
- Presentation of Works within the context of Axis 4 of the Leader +Community Initiative 2000-2006.
“Development of Rural Areas, by means of Pilot Implementations, Platanos Settlement, Municipality of Akrata, Ahaia Prefecture” (with S. Boutis).
- 11thPan-Hellenic Architectural Conference, Zappeio Megaro-Athens March 2011, Lecture:
“The Necessity for the externalization of Architecture in Contemporary Greece – Architecture in Schools”. (D. Abakoumkin).