Editions

CEOI 2026

Location Ljubljana, Slovenia, 5 – 10 July 2026

Participants Austria, Bulgaria, Croatia, Czechia, Germany, Hungary, Italy, Montenegro, Poland, Romania, Serbia, Slovakia, Slovenia, Slovenia (second host team), Switzerland, Ukraine

Official website

CEOI 2025

Location Cluj-Napoca, Romania, 7 – 13 July 2025

Participants Austria, Bulgaria, Croatia, Czechia, Georgia, Germany, Hungary, Moldova, Poland, Romania, Serbia, Slovakia, Slovenia, Switzerland, Ukraine

Official website

CEOI 2024

Location Brno, Czechia, 23 – 29 June, 2023

Participants Austria,Croatia,Czech Republic, Germany, Hungary, Italy, Poland, Romania,Slovakia, Slovenia, Switzerland, Ukraine

Official website

CEOI 2023

Location Magdeburg, Germany, 13 – 19 August, 2023

Participants Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia, Israel, Saxony-Anhalt (second host team), Switzerland, Ukraine

Official website

CEOI 2022

Location Varazdin, Croatia, 24 – 30 July, 2022

Participants Austria,Croatia,Czech Republic, Germany, Hungary, Italy, Poland, Romania,Slovakia, Slovenia, Switzerland, Ukraine

Official website

CEOI 2021

Location Zagreb, Croatia, 1 – 5 September, 2021

Participants Austria,Croatia,Czech Republic, Germany, Hungary, Italy, Poland, Romania,Slovakia, Slovenia, Switzerland

Official website

CEOI 2020

Location Nagykanizsa, Hungary, 23 – 29 August, 2020

Participants Austria,Croatia,Czech Republic, Germany, Hungary, Italy, Lithuania, Poland, Romania, Slovakia, Slovenia, Switzerland, The Netherlands

Official website

CEOI 2019

Location Bratislava, Slovakia, July 23 – July 29, 2019

Participants Armenia, Austria, Croatia,Czech Republic,Germany, Hungary, Italy, Poland ,Romania, Slovakia, Slovenia, Switzerland, Ukraine

Official website

CEOI 2018

Location Warsaw, Poland, 12 – 18 August 2018

Participants Austria, Azerbaijan, Croatia, Czech Republic, Georgia, Germany, Hungary, Italy, Poland, Romania, Slovakia, Slovenia, Switzerland

Official website

CEOI 2017

Location Ljubljana, Slovenia, 10 – 15 July 2017

Participants Austria, Azerbaijan, Croatia, Czech Republic, Georgia, Germany, Hungary, Israel, Italy, Poland, Romania, Slovakia, Switzerland, Slovenia

Official website

CEOI 2016

Location Piatra Neamț, Romania, 18 – 23 July 2016

Participants Bulgaria, Croatia, Czech Republic, Georgia, Germany, Hungary, Moldova, Poland, Romania, Slovakia, Slovenia, Switzerland

Official website

CEOI 2015

Location Brno, Czech Republic, 29 June – 4 July 2015

Participants Croatia, Czech Republic, Georgia,  Germany, Hungary, Poland, Romania, Slovakia, Slovenia,Switzerland

Official website

CEOI 2014

Location Jena, Thuringia, Germany, 18-24 June 2014

Participants Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia,Switzerland

Official website

CEOI 2013

Location Primosten, Croatia, 13-19 October 2013

Participants Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia,Switzerland

Official website

CEOI 2012

Location Tata, Hungary, 7-13 July 2012

Participants Bulgaria, Croatia, Czech Republic, Germany, Hungary, Israel, Poland, Romania, Slovakia, Slovenia,Switzerland, The Netherlands

Official website

CEOI 2011

Location Gdynia, Poland, 7-12 July 2011

Participants Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia,Switzerland

Official website

CEOI 2010

Location Košice, Slovakia, 12-19 July 2010

Participants Bulgaria, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Switzerland

Official website

CEOI 2009

Location Targu Mures, Romania, 8-14 July 2009

Participants Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Switzerland, USA, Serbia, Moldova

Official website

CEOI 2008

Location Dresden, Germany, 6-12 July 2008

Participants Croatia, Czech Republic, Germany, Hungary, Israel, Poland, Romania, Saxony, Slovakia

Official website

CEOI 2007

Location Brno, Czech Republic, 1-7 July 2007

Participants Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Czech Republic II, Brno

Official website

CEOI 2006

Location Vrsar, Croatia, 1-8 July 2006

Participants Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Croatia II, Croatia III

Official website

CEOI 2005

Location Sárospatak, Hungary, 28 July - 5 August, 2005

Participants Bosnia and Herzegovina, Croatia, Czech Republic, Estonia, France, Germany, Hungary, Poland, Romania, Sárospatak, Slovakia, Spain, The Netherlands

Official website

CEOI 2004

Location Rzeszów, Poland, 13-17 July 2004

Participants Bosnia & Herzegovina, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia

Official website

CEOI 2003

Location Münster, Germany, 5-12 July 2003

Participants Croatia, Poland, Czech Republic, Slovenia, Netherlands, USA, Hungary, Slovakia, Romania, Iran, Germany, Westphalia

Official website

CEOI 2002

Location Košice, Slovakia, 30 June - 6 July 2002

Participants Austria, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia, The Netherlands, Iran

Official website

CEOI 2001

Location Zalaegerszeg, Hungary, 10-17 August 2001

Participants Austria, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia, Estonia, Finland, Italy, The Netherlands

Official website

CEOI 2000

Location Cluj-Napoca, Romania, 24-31 August 2000

Participants Croatia, Czech Republic, Germany, Hungary, Moldova, Netherlands, Poland, Romania, Slovakia, Slovenia, USA

CEOI 1999

Location Brno, Czech Republic, 2-9 September 1999

Participants Bosnia-Herzegovina, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia, USA

Official website

CEOI 1998

Location Zadar, Croatia, 20-27 May 1998

Participants Bosnia-Herzegovina, Croatia, Czech Republic, Germany, Hungary, Poland, Romania, Slovakia, Slovenia

CEOI 1997

Location Nowy Sącz, Poland, 17-24 July 1997

Participants Belarus, Croatia, Estonia, Germany, Hungary, Latvia, Lithuania, Netherlands, Poland, Romania, Slovakia, Ukraine, USA, Yugoslavia

CEOI 1996

Location Bratislava, Slovak Republic, 9-13 October 1996

Participants Croatia, Czech Republic, Hungary, Poland, Romania, Slovakia, Slovenia

CEOI 1995

Location Szeged, Hungary, 29 May - 3 June 1995

Participants Belarus, Croatia, Czech Republic, Estonia, Hungary, Lithuania, Poland, Romania, Slovakia, Ukraine, Yugoslavia

Official website

CEOI 1994

Location Cluj-Napoca, Romania, 27-31 May 1994

Participants Croatia, Czech Republic, Hungary, Moldova, Poland, Romania, Turkey, Yugoslavia