| Symposia |
| 1981 - Les Avins en Condroz, Les Avins, Belgium |
| --------- limestone from Belgium |
| 1990 - Symposium in Etna Lava Stone, Bronte, Italy |
| 1994 - Simpetra, limestone, Caldas, Portugal |
| 1994 - Int. Sculpture Symposium, sandstone, Zwickau, Germany |
| 1995 - Finngraniet, granite, Vammala, Finland |
| 1997 - Int. Sculpture Symposium Marble, Teulada, Italy |
| 1997 - Int. Couple Symposium Marble, Taipei, Taiwan |
| 1998 - Scultura Viva, travertine, S. Benedetto del Tronto, Italy |
| 2000 - Mine Int. Marble Symposium, marble, Mine, Japan |
| 2000 - KISS Kyongnam Int. Sculpture Symposium, granite, |
| ____-- Kyongnam, South-Corea |
| 2001 - Int. Sculpture Symposium, marble, Hualien, Taiwan |
| 2002 - Int. Sculpture Symposium, limestone, Fes, Morocco |
| 2002 - Int. Sculpture Symposium, marble, |
| Saint Clair Sur Elle, France |
| 2003 - Int. Sculpture Symposium, granite, Os, Norway |
| 2005 - Int. Sculpture Symposium, marble, Os, Norway |
| 2006 - Int. Sculpture Symposium, marble, Kaohsiung, Taiwan |