Markus Kartheininger was a Research Fellow at the Rosenzweig Center from October 2001 to June 2001 and from October 2002 to June 2003. His project was titled "Memory and Modernity - the Reunderstanding of the Quarrel between Ancients and Moderns in the Early Works of Leo Strauss". This research was published under the title "Heterogenität. Politische Philosophie im Frühwerk von Leo Strauss", Fink Verlag, München, 2006.