The Mathematikzentrum Bonn on Endenicher Allee 60 is home to the Mathematical Institute of Bonn University [2] and to the Hausdorff Center for Mathematics [3].
Links:
[1] https://www.mpim-bonn.mpg.de/de/taxonomy/term/38
[2] http://www.math.uni-bonn.de
[3] http://www.hausdorff-center.uni-bonn.de