Stolpersteine were laid on 22 March 2017 at Brunnenstr. 165 in Berlin for the famous mathematician Alexander Grothendieck and his parents. This unique event brought together students and teachers from the Heinrich Hertz Gymnasium, professional mathematicians, refugee children from the emergency shelter in Moabit, friends and relatives in conversation about Grothendieck's legacy. You can read more about it using the external links below
http://www.math.uni-potsdam.de/~devchand/programm_ag
http://www.math.berlin/orte/verlegung-der-grothendieck-stolpersteine.html
https://www.wissenschaft-frankreich.de/de/materialwissenschaften/mathematik-materialwissenschaften/stolperstein-fuer-den-beruehmten-mathematiker-alexander-grothendieck/