- 17th OLC - Guarujá, State of São Paulo, Brazil
- 16th OLC - Sopot, Poland
- 15th OLC - September 30 - October 5, 2013, Honolulu, Hawaii, USA
- 14th OLC - September 25 - October 1, 2011, Yerevan, Armenia
- 13th OLC - September 28 - October 2, 2009, Erice (TP), Italy
- 12th OLC - October 1-5, 2007, Puebla, Mexico
- 11th OLC - October 2-7, 2005, Sand Key, Florida, USA
- 10th OLC - September 13-19, 2003, Aussois, France
- 9th OLC - October 1-6, 2001, Sorrento (Naples), Italy
- 8th OLC - September 27 - October 1, 1999, Humacao, Puerto Rico
- 7th OLC - September 8-12, 1997, Heppenheim, Germany
- 6th OLC - September 25-29, 1995, Venue. Le Touquet, France
- 5th OLC - October 4-8, 1993, Siofok, Hungary
- 4th OLC - October 7-11, 1991, Cocoa Beach, Florida, USA
- 3rd OLC - October 1-5, 1990, Cetraro, Italy
- 2nd OLC - October 14-20, 1988, Torino, Italy
- 1st OLC - July 15-18, 1986, Napoli, Italy
