| # | Guest | Host | Dates |
| 1 | Martin Albrecht ( Université Pierre et Marie Curie, Paris, France ) | J. Buchmann ( TU Darmstadt ) | January 18, 2011 - January 20, 2011 |
| 2 | Fedor Bogomolov ( New York ) | K. Altmann ( FU Berlin ) | August 02, 2010 |
| 3 | Michael Brickenstein ( Mathematisches Forschungsinstitut Oberwolfach ) | W. Decker ( TU Kaiserslautern ) | September 16, 2010 |
| 4 | Ana-Maria Castravet ( University of Arizona ) | Hannah Markwig ( Saarbruecken ) | July 7, 2011 - July 8, 2011 |
| 5 | Vladimir Gerdt ( Moscow ) | W. M. Seiler ( Kassel ) | October 10, 2010 - April 10, 2011 |
| 6 | Milena Hering ( University of Connecticut ) | Hannah Markwig ( Saarbruecken ) | July 6, 2011 - July 8, 2011 |
| 7 | Felipe Rincon ( UC Berkeley ) | Hannah Markwig ( Saarbruecken ) | July 20, 2011 - July 27, 2011 |