To deepen the cooperation with the partner universities, Prof. Rösler visited Istanbul in May 2025.

In late April 2023, Prof. Rösler taught eight hours at the National and Kapodistrian University of Athens as part of the Erasmus+ program.

In October 2022, Prof. Rösler spent a week teaching at the law school of the Croatian partner university in Rijeka, with funding from the EU’s Erasmus+ program.

In April 2021, Prof. Rösler once again collaborated with the German Foundation for International Legal Cooperation (IRZ).

Due to the pandemic, the GIZ consultations for the conference in Hạ Long took place via Zoom.

The German-American Lawyers' Association is hosting the DAJV LL.M. Day on Monday, October 28, 2019, in Cologne.

To mark the seventh anniversary of China’s Private International Law Act, Prof. Rösler will speak at a conference in Nanjing in December 2018 on public policy and overriding mandatory provisions.

Prof. Rösler will speak on private international law at the International Law Association’s conference “Developing International Law in Challenging Times” in Sydney.