Charles A. Stewart's Talk
	Markus Werning during a talk
	Charles A. Stewart's Talk
	The audience in the Kleiner Hörsaal
	The audience in the Zeichensaal
	Daryn Lehoux's Talk
	During Ivor Grattan-Guinness' Friday Lecture: Bonn mathematicians in the audience
	In the centre: Florian Pop, Chair of the Mathematical Institute in Bonn
	Carl-Friedrich Bödigheimer is chairing the Friday afternoon session; in the front: Friedrich Hirzebruch
	Ivor Grattan-Guinness' Friday Talk