The IAL arranges the International Lichenological Symposium, a major international meeting covering all aspects of lichenology, to be organised every fourth year.
Upcoming IAL Symposium
| 2026 | Tenth International Lichenological Symposium IAL10, Trieste, Italy |
Earlier IAL Symposia
| 2021 | Ninth International Lichenological Symposium IAL9, Bonito, Brazil (Virtual) Website for IAL9 |
| 2016 | Eighth International Lichenological Symposium IAL8, Helsinki, Finland Website for IAL8 |
| 2012 | Seventh International Lichenological Symposium IAL7, Bangkok, Thailand Website for IAL7 |
| 2008 | Sixth International Lichenological Symposium IAL6, Asilomar, USA Website for IAL6 |
| 2004 | Fifth International Lichenological Symposium IAL5, Tartu, Estonia Symposium report on IAL 5 (PDF) |
| 2000 | Forth International Lichenological Symposium IAL4, Barcelona, Spain |
| 1996 | Third International Lichenological Symposium IAL3, Salzburg, Austria |
| 1992 | Second International Lichenological Symposium IAL2, Båstad, Sweden |
| 1986 | First International Lichenological Symposium IAL1, Münster, Germany |