Summer School on Aspherical Spaces, Island Frauenchiemsee, 23-28 September 2018. Non-Positively Curved Groups and Spaces in Regensburg, 18-22 September 2017. Large Scale Dimensions in Regensburg, 25-29 July 2016. Seminar: Coxeter Groups, SS 2016.
DGT seminar in Wrocław GGT in Warsaw Olimpiada Matematyczna Fundacja Matematyków Wrocławskich