Organization of Workshops:

Joint MPE, AIP, ESO workshop on Narrow-Line Seyfert 1 Galaxies (Dec 8-11, 1999)

Workshop on X-ray spectroscopy of active galactic nuclei with Chandra and XMM-Newton (Dec 3-6, 2001)

XEUS - studying the evolution of the hot universe (March 11-13, 2002)

The 2004 Ringberg Castle Workshop on AGN Physics (December 4-8, 2004)

XEUS - A high energy mission of ESA's Cosmic Vision Programme 2015-2025 (September 2008)