Some upcoming or recurrent activities that I organize:

• Marc Burger's prime, FIM, ETH Z�rich, Switzerland, 27 June -- 1 July 2022
• Geometry, dynamics and representations -- a conference in honor of Fran�ois Labourie, Universit� della Corsica, Carg�se, Corsica, 6--10 June 2022
• goMATH, Frauen machen Mathematik, ETH, Switzerland, 14 March -- 25 March 2022
• Workshop Counting problems in Ventotene (LT), Italy, 6--11 September 2021, organized in collaboration with Martin Bridgeman (Boston College), Stefano Francaviglia (Universit� di Bologna), Roberto Frigerio (Universit� di Pisa) and Michah Sageev (Technion, Haifa).
• Conference in honor of Ursula Hamenst�dt, Centro Stefano Franscini, Switzerland, 18 -- 23 July 2021
• Artin groups, CAT(0) geometry and related topics (CharneyFest), Ohio State University, Columbus, OH, USA, 5--9 July 2021
• Alice Roth Lectures
  
• Bernays Lectures
  
• Geometry seminar at ETHZ
• Graduate Colloquium, an activity of the "Z�rich Graduate School"

Some miscellaneous older activities that I organized:

• Symplectic group theory reading seminar, ETH, Winter semester 02 (announcement)
  
• Conference Bounded Cohomology, Harmonic Maps and Higgs Bundles in Strasbourg 14--16 March 2005 and Basel 17--19 March 2005, organized in collaboration with Oliver Baues (Universit�t Karlsruhe), Olivier Biquard (Universit� de Strasbourg), Stefan Wenger (Universit�t Basel) and Anna Wienhard (Universit�t Basel).
• Seminar Higher Teichm�ller theories, organized in collaboration with Sebastian Baader
• Workshop Geometric and Analytic Group Theory in Ventotene (LT), Italy, 9--14 September 2013, organized in collaboration with Gabriella Kuhn (University of Milano Bicocca) and Michah Sageev (Technion, Haifa).
• Introductory Workshop:Dynamics on Moduli Spaces of Geometric Structures, MSRI, 20--23 January 2015, organized in collaboration with Dick Canary (University of Michigan), Bill Goldman (University of Maryland) and Ursula Hamenst�dt (Universit�t Bonn)
• Workshop Manifold and Groups in Ventotene (LT), Italy, 7--12 September 2015, organized in collaboration with Stefano Francaviglia (Universit� di Bologna), Roberto Frigerio (Universit� di Pisa), Kate Juschenko (Northwestern University), Gabriele Mondello (Universit� di Roma La Sapienza) and Michah Sageev (Technion, Haifa)
• Workshop Groups acting on CAT(0) spaces at MSRI, 27-30 September 2016, organized in collaboration with Pierre-Emmanuel Caprace (Universit� de Louvain), Koji Fujiwara (Kyoto University) and Michah Sageev (Technion, Haifa)
• Special semester Non-Positive Curvature Group Actions and Cohomology at the Isaac Newton Institute, Cambridge, UK, January 3rd--June 23rd, 2017, organized in collaboration with Goulnara Arzhantseva (Universit�t Wien), Cornelia Drutu (Oxford University) and Nicolas Monod (EPFL).
• Workshop Border-Crossing Workshop: Group action and cohomology in non-positive curvature at the Isaac Newton Institute, 19-23 June 2017, organized in collaboration with Mladen Bestvina (University of Utah), Brian Bowditch (University of Warwick) and Nicolas Monod (EPFL), in the context of the special semester "Non-Positive Curvature, Group Actions and Cohomology".
• Workshop Moduli Spaces in Ventotene (LT), Italy, 11--16 September 2017, organized in collaboration with Stefano Francaviglia (Universit� di Bologna), Roberto Frigerio (Universit� di Pisa), Kate Juschenko (Northwestern University) and Michah Sageev (Technion, Haifa).
• Workshop Borel seminar: Topology and Dynamics in the Swiss Alps in Les Diablerets (VD), Switzerland, 3-7 December 2018, organized in collaboration with Christoforos Neofytidis (Universit� de G�n�ve) and Federico Rodriguez Hertz (Penn State University.
• goMATH, Frauen machen Mathematik, ETH, Switzerland, 11 -- 22 March 2019
• Workshop Of coarse! Quasi-isometries and groups: rigidity and classification in Ventotene (LT), Italy, 9--14 September 2019, organized in collaboration with Martin Bridgeman (Boston College), Anna Erschler (ENS), Stefano Francaviglia (Universit� di Bologna), Roberto Frigerio (Universit� di Pisa), Fanny Kassel (IHES & CNRS) and Michah Sageev (Technion, Haifa).
• Virtual geometric group theory conference, CIRM, Luminy, France, 1 -- 5 June 2020

Random miscellaneous links

• World clock
• Currency exchange
• Some help with English
• Some German
• Some English grammar
• Movies in Z�rich: Kulturifo, Cineman , Xenix or Arthouse

From an even older Web page

• Some old courses I taught at the University of Maryland for which Web pages were available (that is most, if not all, courses taught since Spring 1996).
• Some old and not particularly nice pictures