- October 1995: Leysin, Switzerland
- October 1997: Barcelona, Spain
- September 2000: Porto, Portugal
- August 2002: Västerås, Sweden
- September 2004: Vienna, Austria
- June 2006: Turin, Italy
- May 2008: Dresden, Germany
- May 2010: Nancy, France
- May 2012: Lemgo/Detmold, Germany
- May 2014: Toulouse, France
- May 2015: Palma de Mallorca, Spain
- May 2016: Aveiro, Portugal
- May 2017: Trondheim, Norway
- June 2018: Imperia, Italy
- May 2019: Sundsvall, Sweden
- April 2020: Porto, Portugal
