The MPIM Topology seminar is a weekly seminar, usually taking place on Monday afternoons. Most talks consist of two parts, first an introductory one for a general audience, then a second for specialists.
Links:
[1] https://www.mpim-bonn.mpg.de/taxonomy/term/41
[2] https://www.mpim-bonn.mpg.de/node/3444
[3] https://www.mpim-bonn.mpg.de/node/5518
[4] https://www.mpim-bonn.mpg.de/node/5518/program?page=last
[5] https://www.mpim-bonn.mpg.de/node/5518/abstracts