Symmetric functions: surveys of developments and perspectives,
Cambridge, July 2001. 

Classical invariant theory,
Kingston, Canada, April 2002. 

Oberwolfach


Geometry and representations, Luminy, April 2005. 

Lie groups, algebraic groups and transformation groups A conference in honour of Ernest B. Vinberg's 70th birthday Bielefeld 2007 

The Interplay of Algebra and Geometry A conference in honour of Corrado De Concini Cortona, Il pazazzone, June 1420 2009 