Ines Sonder was a Post Doctoral Research Fellow at the Rosenzweig Center from January to March 2005. Her research project was titled "Bernhard, Emil, Charlotte – the German-Jewish Family Cohn and its Contribution to the Idea of Zionism".

Based on this research Ines Sonder persued in 2006-2009 the research project "Lotte Cohn und die Anfänge deutsch-jüdischer Architektur- und Siedlungskonzeptionen in Palästina/Israel", which was funded by the DFG.