15-17 September 2004 - Budapest
The European Scientist. Symposium on the era and work of Franz Xaver von Zach (1754-1832)
Scientific Organizing Committee:
Peter Brosche (Daun/Bonn, chairman),
Jim Caplan (Marseille),
Anita McConnell (London),
Gudrun Wolfschmidt (Hamburg)
Local Organizing Committee (Budapest):
Bela Balazs,
Lajos G. Balazs (chairman),
Laszlo Patkos,
Magda Vargha,
Endre Zsoldos.
April 2005 - Nürnberg:
Tagung "Astronomie in Nürnberg"
Arbeitskreis Astronomiegeschichte
in Zusammenarbeit mit dem Cauchy-Forum
(mit Pierre Leich, Günter Löffladt)
April 27-29, 2011 - Tartu, Estonia Expanding the Universe, International Scientific Conference
celebrating 200th anniversary of opening the Old Tartu Observatory,
organized by Jaan Einasto and Laurits Leedjärv,
GW Member of Scientific Organising Committee
Convention of the Antique Telescope Society, Hamburg, 28. September - October 2, 2012, with a trip to Göttingen, Kassel, Jena, Dresden and Berlin organized by Gudrun Wolfschmidt and Walter Stephani in cooperation with Bart Fried