2003/04 Fields Institute, Toronto, Canada Thematic Program on Operator Algebras
2003/04 Institut Mittag-Leffler, Sweden Noncommutative Geometry
2003/04 Utrecht and Amsterdam, The Netherlands. Master class on noncommutative geometry
March-July 2004 Institut Henri Poincaré, Paris K-theory and noncommutative geometry
Spring and early summer 2004 Erwin Schrödinger Institute Vienna Tensor categories in mathematics and physics